Osmotic adjustment increases water uptake, remobilization of assimilates and maintains photosynthesis in chickpea under drought.

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dc.contributor.authorBasu, P Sen_US
dc.contributor.authorAli, Masooden_US
dc.contributor.authorChaturvedi, S Ken_US
dc.date.accessioned2009-05-28T15:05:06Z
dc.date.available2009-05-28T15:05:06Z
dc.date.issued2007-03-22en_US
dc.description.abstractEight chickpea advanced breeding lines (ABLs) and their parents were evaluated for osmotic adjustment (OA), leaf carbohydrates and gas exchange under dryland field . These (ABLs) were derived from crosses between CTS 60543 x Kaniva and Tyson x Kaniva. Mean leaf water potential (LWP) fell down from -1.00 MPa at pre-stress level to about -2.25 MPa during terminal stress. Relative water content (RWC) showed periodic changes with alternate decrease or increase at certain interval, which also influenced the values of OA (low or high) in number of genotypes e.g. Kaniva, CTS 60543, Tyson and M 75. Significant variation in OA ranging 0.45 to 0.88 MPa was observed at high level of stress at -2.5 MPa. However, none of the genotypes showed stability of OA over the period of stress. Leaf starch declined even at mild stress (LWP, -1.6 MPa) resulting in an increase in hexose sugars and activation state of sucrose-phosphate synthase (SPS) that led to accumulation of sucrose. Both photosynthesis (Pmax) and transpiration decreased concurrently in two chickpea lines M 129 and Tyson with increasing water stress. However, rate of decline in the photosynthesis slowed down even drought was further intensified. The observed periodic changes in OA, RWC and photosynthesis appeared to be associated with drought-induced changes in SPS and carbohydrates which modify water uptake of the leaves.en_US
dc.description.affiliationIndian Institute of Pulses Research (ICAR), Kanpur 208 024, India. basups@satyam.net.inen_US
dc.identifier.citationBasu PS, Ali M, Chaturvedi SK. Osmotic adjustment increases water uptake, remobilization of assimilates and maintains photosynthesis in chickpea under drought. Indian Journal of Experimental Biology. 2007 Mar; 45(3): 261-7en_US
dc.identifier.urihttps://imsear.searo.who.int/handle/123456789/61535
dc.language.isoengen_US
dc.source.urihttps://www.niscair.res.in/ScienceCommunication/ResearchJournals/rejour/ijeb/ijeb0.aspen_US
dc.source.urihttps://nopr.niscair.res.in/bitstream/123456789/5245/1/IJEB%2045%283%29%20261-267.pdfen_US
dc.subject.meshCicer --physiologyen_US
dc.subject.meshDisastersen_US
dc.subject.meshOsmosisen_US
dc.subject.meshPhotosynthesisen_US
dc.subject.meshWater --metabolismen_US
dc.titleOsmotic adjustment increases water uptake, remobilization of assimilates and maintains photosynthesis in chickpea under drought.en_US
dc.typeJournal Articleen_US
dc.typeResearch Support, Non-U.S. Gov'ten_US
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