INFLUENCE OF WATER LOGGING ON CERTAIN PHYSIOLOGICAL AND BIOCHEMICAL CHARCTERS OF PIGEONPEA (Cajanus cajan (L.) Millsp)

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dc.contributor.advisorUMAMAHESH, V
dc.contributor.authorYOHAN, Y
dc.date.accessioned2016-11-10T15:46:15Z
dc.date.available2016-11-10T15:46:15Z
dc.date.issued2014
dc.description.abstractLaboratory and pot culture experiments were conducted at P.G Laboratory, Department of Crop Physiology, S.V. Agricultural College, Tirupati and at RARS, Tirupati during Kharif, 2013-2014. The laboratory experiment was conducted in a Completely Randomized design with 17 red gram genotypes. There were five treatments with four replications. Three genotypes were selected based on their performance evaluated through germination percentage, vigor index and electrical conductivity .Germination percentage and vigor index of LRG-30 was 76.25% and 60.81 respectively. Besides LRG-30, Maruti and Asha were the other genotypes used to evaluate the sensitive stage of redgram crop to waterlogging through a pot culture experiment. Experimental layout for pot culture was in split plot design. Three main stress imposing stages viz., 40 DAS, 80 DAS and 120 DAS were taken as main plots and three genotypes (LRG 30 (Palanadu), ICPL 8863 (Maruti) and ICPL 87119 (Asha)) were taken as sub plots. All the morphological and physiological characters used for evaluation of Pigeonpea genotypes under waterlogged conditions viz., plant height, number of primary branches, leaf area, total dry matter, leaf dry matter, root dry matter, SLA, SLW, CGR, LAI varied significantly among waterlogging treatments and genotypes at all stages of crop growth. Biochemical characters viz., SPAD chlorophyll meter reading (chlorophyll content), total sugars, reducing sugars and super oxide dismutase enzyme content varied significantly at all the stages of stress imposition viz., 40DAS, 80DAS, 120DAS. Anatomical character in terms of aerenchyma formation was also varied among the genotypes as a response to hypoxia. The average percentage decrease over before imposing stress three genotypes at three different crop growth stages with respect to leaf area, root dry weight and LAI was 66.73, 42.12 and 66.13, where as the same values for chlorophyll content, total sugars, reducing sugars and superoxide dismutase content were record 38.07, 28.47, 48.66 and 36.40. The results showed that the number of pods per plant seems to be the major yield component affected seed yield under stress. Among the crop growth stages pod development stage was the most sensitive stage as for as final yield is concerned. Among the genotypes LRG-30 proved superior in majority of physiological and biochemical characters compared to Asha and Maruti. Higher seed yield was also observed in LRG 30 (27.51 g plant-1) followed by Asha (26.70 g plant-1) and Maruti (13.57 g plant-1). Water logging at 40DAS affected plant height and crop growth rate. When stress was imposed at 80DAS number of primary branches, leaf area, SLA, LAI and SLW were affected. A greater decrease in leaf area, total dry matter, leaf dry weight and root dry weight was observed when stress was imposed at 120 DAS. The present study forms a physiological basis to understand the sensitive stage of redgram to waterlogging stress.en_US
dc.identifier.citation147p.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/84933
dc.language.isoen_USen_US
dc.publisherACHARYA N.G. RANGA AGRICULTURAL UNIVERSITYen_US
dc.relation.ispartofseriesD5018;
dc.subCrop Physiologyen_US
dc.subjectcrops, productivity, area, biological development, cereals, diseases, vegetables, nuts, grain legumes, fruits, INFLUENCE WATER, PHYSIOLOGICAL, BIOCHEMICAL, CHARCTERS PIGEONPEA, Cajanus cajan L. Millspen_US
dc.titleINFLUENCE OF WATER LOGGING ON CERTAIN PHYSIOLOGICAL AND BIOCHEMICAL CHARCTERS OF PIGEONPEA (Cajanus cajan (L.) Millsp)en_US
dc.typeThesisen_US
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