ID: 56302
Title: Dose related effects of nicotine on oxidative injury in young, adult and old rats
Author: Anshu Jain, S J S Flora
Editor: Dr. R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 2, March 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Nicotine, oxidative stress, glutathione, acetyl cholinesterase, superoxide dismulate, catalase activity
Abstract: Nicotien affects a variety of cellular process ranging from induction of gene expression to secretion of hormones and modulation of enzymatic activities. The objective of the present study was to study the dose dependent toxicity of nicotine on the oxidative stress in young, adult and old rats which were administered 0.75, 3 and 6 mg/kg nicotine as nictine hydrogen tartarate intraperitoneally for a period of seven days. No changes were observed in blood catalase (CAT) activity and level of blood reactive oxygen species (ROS) in any of the age group at the lowest dose of nicotine. However, at the highest dose (6 mg/kg nicotine) ROS level increased significantly from 1.17 to 1.41 ?M ml-1in young rats from 1.13 to 1.40? M ml-1 in old rats. However, no change was observed in blood ROS levels of adult rats. Administration of 3 mg/kg nicotine resulted in an increase in level of reduced glutathione (GSH) in rats of all the age groups. The young animals were the most sensitive as a dose of 6 mg/kg resulted in decline in the levels of reduced GSH to 0.89 mg/ ml as compared to normal control (1.03 mg/ml). The antioxidant enzymes SOD and CAT were sensitive to a dose of 6 mg/kg as it resulted in decline of the enzymatic acitivity in all age group animals. Also, administration of nicotine at a lower dose of 3 mg/kg inhibited SOD activity from 1.48 to 1.20 units/min/mg protein in old rats. Catalase activity showed a similar trend at a dose of 3 mg/kg. Adminstration of nicotine also increased the blood lipid perioxidation levels at all three doses in young and old rats dose dependently. Nicotien exposure also increased ROS in brain at the doses of 3 adn 6 mg/kg in all the three groups. Brain GSH decreased significantly at high dose of nicotine (6 mg/kg b.wt) in adult ratss (3.68 mg/g) but in young rats level increased to 4.40 mg/g at the lower dose (0.75 mg/kg nicotine). Brain lipid peroxidation increased at all doses of nicotine in young as well as old rats as compared to their respective normal control. The SOD activity increased significantly in young (2.88 units min/mg/protein) and old rats (1.81 units min/mg protein) as compared to their respective normal at a dose of 6 mg/kg. Interestingly, the SOD activity decreased in adult rats (2.18 units/min/mg protein) as compared to its normal control. Catalase activity decreased at the dose of 3 mg/kg and 6 mg /kg nicotine in young and old rats but no effect was observed in adult rats at any of the doses. Acetylcholine esterase (AchE) activity decreased in a dose dependent manner in adult and old rats. Overall, the results of the study indicate that young and old rats are more sensitive to nicotine induced oxidative stress as compared to the adult ones.
Location: 241
Literature cited 1: None
Literature cited 2: None
ID: 56301
Title: Effect of physico-chemical treatments on ripening behavior and post-harvest quality of Amrapali mango (Mangifera indica L) during storage
Author: Pankaj Singh, Manoj Kumar Singh, Vipin Kumar, Mukesh Kumar, Sunil Malik
Editor: Dr. R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 2, March 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Physical and chemical treatments, ripening behavior, post-harvest quality, Amrapali mango
Abstract: An experiment was done to assess the effect of various physico-chemical treatments on ripening behavior and post harvest quality of mango cv. Amrapali. The experiment was planned under completely randomized design (CRD) with three replications. The treatment units was five fruits per replication. Total 14 treatments were applied. Out of these, ethrel 750 ppm treated fruits showed better results in respect of specific gravity(0.88), moisture loss (8.45%), decay (2.5%), total soluble solids (TSS, 20.70 brix), sugar content (14.39%) and acidity content (0.32) followed by ethrel 500 ppm; specific gravity (0.90), moisture loss (8.82%), decay (3.5%), TSS (20.70brix), sugar content (13.99%) and acidity content (0.36%). The rpedicellate fruits and ethrel+bavistin (750+1000ppm) were also found to be significantly superior over control in respect of specific gravity (0.88 and 0.86), moisture loss (9.10 and 9.33%), decay (4.0 and 5.33%), TSS (20.1 and 20.40brix), sugar content (12.70 and 12.80%) and acidity content (0.42 and 0.38%), respectively. Based on results of this study, it can be concluded that ethrel 750 ppm was found to be the most suitable treatment in improving physico-chemical traits i.e. ripening, storage, quality and shelf-life for commerical purpose in mango.
Location: 241
Literature cited 1: None
Literature cited 2: None
ID: 56300
Title: Novel application of fungal Phanerochaete sp. and xylanase for reduction in pollution load for paper mill effluent
Author: Ravi Dutt Yadav, Smita Chaudhry, Sanjeev Gupta
Editor: Dr. R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 2, March 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Adsorbable organic halides, biobleaching, biopulping, white rot fungus, xylanase
Abstract: Four different strategies of pulping and bleaching were carried out to develop alternative mechanistic ecoenvironmental friendly approaches and generated effluent was characterised. Strategy-I included Phaneochaete sp. fungal pretreatment followed by convention bleaching, whereas in strategy -II, fungal pretreatment was followed by enzyme xylanase aided bleaching. Strategy-III also included xylanase supplement but without prior fungal pretreatment. Chemically driven pulping and bleaching was the IV strategy. Conventional CDEOPD1D2 sequence of bleaching was sued for strategy - I and IV whereas XCDEOPD1D2 sequence was applied to strategy-II and III. Strategy -II was responsible for 27.5% reduction in Kappa no. whereas the maximum (27.5%) reduction in refining energy was observed with strategy-II. Biobleaching strategies-II and III were helpful in saving 37.3 and 20.3% of elemental chlorine (Cl2) and 30.8 and 23.1% of chlorine dioxide (ClO2) respectively. In comparison to control (strategy - IV), strategy II resulted in maximum pollution load reduction of chemical oxygen demand (COD), biological oxygen demand (BOD), color and adsorbable organic halides (AOX) upto 57, 60, 30 and 43.6%, respectively.
Location: 241
Literature cited 1: None
Literature cited 2: None
ID: 56299
Title: Variation in wood fibre traits among eight populations of Dipterocarpus indicus in Western Ghats, India
Author: A G Devi Prasad, Nageeb, A. Al-Sagheer
Editor: Dr. R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 2, March 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Anatomical ratio, Dipterocarpus indicus, Fibre properties, locality factors, population variation
Abstract: Wood elements and anatomical ratio of Dipterocarpus indicus were studied to evaluate variation among populations and to recommend for end selection. The variation of wood element [fibre length (FL), fibre diameter (FD), lumen diameter (LD), cell wall thickness (CWT), double wall thickness (DWT), and lumen volume (LV)] and anatomical ratio [fibre lumen area (FLA), slenderness ratio (SR) and runkel ratio (RR)] were investigated in a girth class of 100-120 cm among eight populations of Dipterocarpus indicus in Western Ghats, India. The study revealed a significant variations in Fl (0.2426), FD (4.7019), LD (3.1689), CWT (2.7104), DWT and (5.4298) among populations. The variations in anatomical ratios were significant among populations except in case of LV. The causes of variations among populations in their wood traits were attributed to the site factors. The interactions between genetic makeup of wood traits combined with effects of edaphic, local and regional climatic conditions reflect the amount of variation among populations. The highest coefficient of variation (CV%) for FL, FD, CWT and DWT was recorded in population of Gundya whereas low coefficient of variation were recorded in the population of Makuta (FL), Devimane (FD, CWT and DWT), and Sampaje (LD). The wood or Dipterocarpus indicus was found undesirable for pulp wood but can be utilized for plywood timbers.
Location: 241
Literature cited 1: None
Literature cited 2: None
ID: 56298
Title: Growth, biomass production and remediation of copper contamination by Jatropha curcas plant in industrial wasteland soil
Author: S V Ghavri, Rana P Singh
Editor: Dr. R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 2, March 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Bioaccumulation, copper toxicity, industrial wasteland, Jatropha curcas
Abstract: The survival, biomass production and copper (Cu) remediation efficiency of Jatropha curcas L. was evaluated in Cu rich industrial wasteland soil (IWLS), collected from a local town, Sandila (Hardoi), Uttar Pradesh, India. The IWLS had high bulk density, water holding capacity (WHC), pH, electrical conductivity (EC), organic carbon and NPK. The Cu and Mn contents in IWLS were about 3 and 2 fold higher than that in the normal field soil (control). Stem cuttings of the J. curcas clones (BTP-A, BTP-n and BTP-K) were planted in IWLS as well as the same amended with cowdung or sand. The percent survival, net elongations and biomass accumulation of J. curcas were decreased slightly in IWLS, as compared to the control soil. The translocation of Cu from soil to the plants was higher in IWLS grown plants, which was more pronounced in IWLS amended with cowdung. J. curcas clones BTP-N, showed better survival and Cu removal efficiency from IWLS.
Location: 241
Literature cited 1: None
Literature cited 2: None
ID: 56297
Title: Studies on antioxidative enzymes induced by cadmium in pea plants (Pisum sativum)
Author: Nalini Pandey, Gaurav Kumar Singh
Editor: Dr. R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 2, March 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Cadmium, antioxidant enzymes, oxidative stress, Pisum sativum
Abstract: Pea plants (Pisum sativum cv. Swati) exposed to different concentration of cadmium (50, 100, 200? M Cd) under controlled glass house conditions were quantified for different physiological parameters and antioxidative enzymes. In pea plants, Cd produced a significant inhibition of growth and induced chlorosis, marginal yellowing and necrosis in young leaves, the effect being most pronounced at 200 ?M Cd supply. An alteration in the activated oxygen metabolism of pea plants were also detected as evidenced by an increase in concentration of H2O2 and TBARS along with decrease in the chlorophyll and carotenoid concentration in leaves. Cadmium toxicity induced an increase in non-protein thiol, ascorbate, proline and cysteine concentration. A significant increment in the activity of SOD, APX and GR, and a decrease in CAT was observed as a result of Cd treatment. The enhanced activity of SOD and inhibition of CAT and POD produces a high build up of H2O2 which appears to be the main cause of oxidative stress due to Cd toxicity in pea plants.
Location: 241
Literature cited 1: None
Literature cited 2: None
ID: 56296
Title: Population dynamics of a parasite Pallisentis in two species of fish Channa punctatus and Channa striatus
Author: N Gupta, P Singhal, D K Gupta
Editor: Dr. R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 2, March 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Channa punctatus, Channa striatus, Parasite, Pallisentis, population dynamics
Abstract: In an aquatic environment, there is a profound and inverse relationship between environment quality and disease status of fish. Parasites are one of the most serious limiting factors in aquaculture. Therefore, the present investigation has been undertaken to sort out the population dynamics of Pallisentis (Acanthocephala), in relation to host sex from freshwater fishes, Channa of Rohikhand region. A total of 517 fishes (Channa punctatus, n = 198 and C. striatus, n = 319) were examined regularly from August 2006 to February 2010. Overall prevalence of Pallisentis in C. striatus was higher in females (67.78%) as compared to males (63.52%). In case of C. punctatus, overall prevalence of Pallisentis was higher in males (53.77%) as compared to females (52.17%) whereas, relative density was higher in females (61.41%) than in males (52.72%). Intensity (2-3 parasite/host, in both sexes), density (1.36 in males and 1.69 in females) and infection index (0.73 in males and 0.88 in females) were recorded.
Location: 241
Literature cited 1: None
Literature cited 2: None
ID: 56295
Title: Observation on an isopod parasitizing the edible fish Parastromateus niger in the Parangipettai coast of Idnia
Author: G Ramesh Kumar, S Ravichandran, J P Trilles
Editor: Dr. R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 2, March 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Parastromateus niger, Cymothoa eremita, Crustacea, Cymothoidae
Abstract: Cymothoidae are big parasites on fishes and often they are host specific. This study reports that in India, the Black pomfret (Parastromateus niger), a highly edible marine fish belonging to the family Carangidae, is the type host of Cymothoa eremita (Isopoda, Cymothoidae). Among one hundred and sixty fish examined from April to July, 2010 in Paragipettai coastal waters, only three female specimens were infested in June, 2010. It seems that such parasitism depends particularly on the season and on the host sex.
Location: 241
Literature cited 1: None
Literature cited 2: None
ID: 56294
Title: Plasmid profiles of mercuric chloride tolerant rhizobia from horse gram (Macrotyloma uniflorum)
Author: Prabhavati Edulamudi, Antony Johnson A M, Venkata Ramana Sai Gopal Divi, Veera Mallaiah Konada
Editor: Dr. R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 2, March 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Metal tolerance, mercuric chloride, rhizobia, plasmids,Macrotyloma uniflorum
Abstract: Thirty two rhizobia were isolated from the fresh healthy root nodules of horse gram. They were found to be highly salt tolerant. They were identified as rhizobia by cultural, biochemical and 16SrRNA sequence. The sequences of the four selected isolates were deposited in the NCBI GenBank. The obtained accession numbers were GQ483457, GQ483458, GQ483459 and GQ4834460. All the rhiozbia were able to grow at 10 ppm mercuric chloride concentration. Four isolates HGR-11, 16, 30 and 31 were used to study the effect of different concentrations of mercuric chloride on the growth of rhizobia. These isolates were able to grow at 30 ppm concentration also. In these isolates, HGR-11 and HGR-30 showed maximum growth at 20 ppm than at control. These isolates contained one mega plasmid (~22kb) at 20 ppm mercuric chloride concentration.
Location: 241
Literature cited 1: None
Literature cited 2: None
ID: 56293
Title: Seasonal distribution of Isotomina thermophilian in a secondary succession and a homegarden in Cachar, Assam
Author: Ranabijoy Gope, D C Ray
Editor: Dr. R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 2, March 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Climatic variables, total nitrogen, multiple regression, Isotomina thermophila, Seasonal ecology
Abstract: Present investigation was carried out in Cachar district of Assam over a period of two years (May 2007-April 2009) to understand the seasonal ecology of Isotomina thermophila (Axelson, 1900) in secondary succession and homegarden ecosystems. Population was found to be maximum during July 2008 (7949.05 No. m-2) and September 2008 (7949.05 No. m-2) in homegarden whereas the peak was recorded in secondary succession during September 2008 (13656.05 No. m-2). Least population was encountered during March 2008 (1222.93No. m-2) and April 2008 (1630.57 No. m-2) in homegarden and secondary succession, respectively. It may be due to the fact that, vital acitiviyt of this species effected in the dry period or migrate towards lower soil profile in search of food and moisture. Linear regression analysis established the phypothesis that all the environmental variables showed positive and significant influence on the population dynamics whereas in homegarden, rainfall (r=0.36, p>0.05) did not show any influence. In multiple regression analysis positive and significant influences (p<0.05) were recorded for both the investigated sites. Rainfall, relative humidity and temperature facilitated the soil moisture, microbial activity, litter decomposition may favour the reproduction and growth rate of the species. Among microclimatic conditions except soil pH all other parameters exhibited significant correlations (p<0.05) with population. Based on the present investigation, it can be concluded that l. thermophilia does not differ much with the general ecology of collembolans in this sub humid climate.
Location: 241
Literature cited 1: None
Literature cited 2: None
ID: 56292
Title: Effects of cadmium on growth and metabolism of Phaseolus mungo
Author: Geeta Siddhu, M A Ali Khan
Editor: Dr. R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 2, March 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Phaseolus mungo, Cadmium, nitrate reductase activity, sugar and protein contents
Abstract: An attempt has been made to assess the response of Phaseolus mungo L. under influence of cadmium chloride (CdCl2) with special reference to growth, morphology, yield and biochemical aspects. Surface sterilized seeds of Phaseolus mungo L. cv. T-9 were exposed to various concentrations of CdCl2 solution (10-2M, 10-4M, 10-5M, 10-8 M and control) for 12 hr at room temperature adn these seeds were transferred to petriplates and polythene bags in triplicate. 10-2 M concentration was found to have deleterious effects on seed germination, germination relative index, length and dry weight of root and shoot, shoot root ratio and seedling vigour index, plant height, phytomass, number of leaves and branches, leaf area and chlorophyll contents while 10-8 M revealed slightly promotory effects. Phytotoxicity percentage and chlorophyll stability index were maximum in (10-2M) concentration, while minimum in 10-8 M concentration of Cd Cl2. Nitrate and nitrite reductase activity was markedly inhibited at higher concentration. Low dose of Cd (10-8M) did not affect soluble sugar contents of seeds but it induced a significant increase at higher concentration (10-2M). It however, did not affect protein contents of seeds accept at higher concentration.
Location: 241
Literature cited 1: None
Literature cited 2: None
ID: 56291
Title: Assessment of the toxicity of waste water from a textile industry to Cyprinus carpio
Author: H Roopadevi, R K Somashekar
Editor: Dr. R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 2, March 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Cyprinus carpio, Toxicity evaluation, textile effluent, toxicity factor, acute toxic unit
Abstract: Static, short-term, acute toxicity tests were performed over a period of 96 hrs using different concentrations of influent and effluent of textile industry waste water with the objective of evaluating their acute toxicity on fresh water fish, Cyprinus carpio (common carp). The LC50 24, 48, 72 and 96 hr of influent and effluent were 25.9, 21.10, 15.66, 11.11% (v/v) and 63.18, 54.89, 48. 62, 36.04% (v/v), respectively. The acute toxic unit TUa values for 24, 48, 72, 96 hr for influent and effluent are 3.85, 4.73, 6.38, 8.99 and 1.58, 1.82, 2.05, 2.77, respectively. Correspondingly, the TF was found to be 1, 1.22, 1.65 and 2.33 for influent, and for effluent 1, 1.15, 1.29 and 1.75. Total efficiency of the treatment was 69.16% and the safe concentration of effluent is set to be 3.60%. These data are highly useful in establishing limits of acceptability by the aquatic animals. The need to introduce toxicity evaluation assay for confirming the quality of effluent from the point view of effective environmental safe limits and to ensure integrity of aquatic environment, is stressed.
Location: 241
Literature cited 1: None
Literature cited 2: None
ID: 56290
Title: Comparison of PCR based marker systems for genetic analysis in different cultivars of mango
Author: Navin Srivastava, Anju Bajpai, Ramesh Chandra, S Rajan, M Muthukumar, Manoj Kumar Srivastava
Editor: Dr. R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 2, March 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Mango, genetic relationship, polymorphic information content, marker index, effective multiplex ratio, diversity index
Abstract: Native diversity is well represented in northern and eastern parts of India for mango. We evaluated three important polymerase chain reaction (PCR) based marker techniques viz., random amplified polymorphic DNA (RAPD), inter simple sequence repeat (ISSR) and directed amplified mini satellite DNA (DAMD) and examined their suitability for depicting genetic relationships and discrimination among closely related group of 46 mango varieties grown in the different agro-ecological zones in Uttar Pradesh, Bihar and West Bengal. Nine RAPD, eleven ISSR and four DAMD primers generated 110, 160 and 43 discrete fragments, respectively, accounting for polymorphism of 87.3, 79.83 and 83.72%, respectively. Cumulative analysis of these markers resulted in comprehensie UPGMA based dendrogram where in native mangoes representing important breeding lines and varieties from Uttar Pradesh fall more or less in separate cluster, while Bihar and West Bengal cultivars represent genetically different lineage forming distinct separate cluster. The prime focus on the study was towards identification of genetic variability that warrants establishing origin and molecular evolution of mango cultivars of eastern and northern India because they are the rich gene pool for conservation. Highest diversity index (DI) and polymorphic information content (PIC) values were found in DAMD indicating it to be more infomative than others. Similarly, high effective multiplex ratio (EMR) and marker index (MI) were recorded by ISSR reflecting ability to simultaneously detect a large number of bands. The study accomplished estabilishing genetic relationship and also DNA fingerprint development. The data is also useful for mapping studies for gene identification.
Location: 241
Literature cited 1: None
Literature cited 2: None
ID: 56289
Title: Pandemic influenza A/H1N1 virus in a swine farm house in Sicily, Italy
Author: A. Guercio, G Purpari, P G Conaldi, V Pagano, A Moreno, P Giambruno, L Di Trani, G Vaccari, E Falcone, A Boni, P Cordioli
Editor: Dr. R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 2, March 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Swine, Pandemic influenza, A/H1N1 virus, sequencing, Zoonosis
Abstract: This report describes a pandemic A/H1N1 (H1N1 pdm) virus outbreak occurred in December, 2009 in a swine farm used as research facility (Istituto Mediterraneo Trapianti e Terapie ad Alta Specializzazione) for Preclinical studies, located in Sicily, Italy. All the 13 pigs of the farm, showed cough, fever, inappetence and weakness. At the same time, an unvaccinated worker of the stability showed influenza-like symptoms. RNAv extracted from two swabs collected from infected pigs resulted positive by Real Time RT-PCR for Influena A virus. Furthermore, after growth on enbryonated eggs, viral isolates were identified by Real Time RT-PCR specific for H1N1 pdm virus and characterized antigenically. Sequencing of the whole genome was also performed. All sera takne from animals and from the worker were tested by a competitive Influenza A ELISA and by the haemoagglutination inhibition test. Serological findings confirmed the circulation of influeza virus H1N1 pdm in pigs and the presence of specific antibodies against H1N1 pdm in human serum. The results of this study seem to support a H1N1 pdm transmission from man to animals showing the importance of serological and virological investigation to control the pig farms and the importance of close cooperation between the different authorities like veterinarian and human public.
Location: 241
Literature cited 1: None
Literature cited 2: None
ID: 56288
Title: Effects of " short" photoperiods on seedling growth of Pinus brutia
Author: V Iakovoglou, K Radoglou, P Kostopoulou, O. Dini-Papanastasi
Editor: Dr. R C Dalela
Year: 2012
Publisher: Triveni Enterprises, Vol 33, No 2, March 2012
Source: Centre for Ecological Sciences
Reference: None
Subject: Journal of Environmental Biology
Keywords: Afforestation, Pinus brutia, reforestation, short photoperiod
Abstract: This study investigated how nurseries could benefit by inducing "short" photoperiods as low as 4 hr to produce "better" seedlings characterized by more vigorous root; a substantial feature to overcome transplanting stress. The carryover effect of the photoperiod was also investigated on seedling that grew for 30 days more under the consistent 14 hr photoperiod. Seedlings of Pinus brutia were subjected to 4, 6, 8 and 14 hr photoperiod for 3 week. Fifteen seedlings were used to evaluate the leaf area, the root and shoot dry weight and their ratio. Six and sixteen seedlings were used to evaluate the shoot electrolyte leakage and the root growth potential, respectively. Based on the results, the 6 and 8 hr photoperiod indicated greater root allocation (4.8 and 4.9 mg, respectively) and chlorophyll content (3.7 and 4.4, respectively). They also indicated greater leaf area values (3.3 and 3.5 cm2, respectively) along with the 14 hr (3.4 cm 2). The photoperiod effect continued even after seedlings were subjected at consistent photoperiod. Overall, "short" photoperiods could provide "better" P. brutia seedlings to accommodate immediate massive reforestation and afforestation needs.
Location: 241
Literature cited 1: None
Literature cited 2: None