Chlorophyll fluorescence kinetics and response of wheat (Triticum aestivum L.) under high temperature stress

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dc.contributor.authorJain, Neeluen_US
dc.contributor.authorSingh, GPen_US
dc.contributor.authorPandey, Rakeshen_US
dc.contributor.authorP, Ramyaen_US
dc.contributor.authorSingh, PKen_US
dc.contributor.authorNiveditaen_US
dc.contributor.authorPrabhu, KVen_US
dc.date.accessioned2020-01-02T06:32:13Z
dc.date.available2020-01-02T06:32:13Z
dc.date.issued2018-03
dc.description.abstractHigh temperature stress during grain filling period in wheat (Triticum aestivum L.) has pronounced effects on yield in major wheat growing agro-ecological zones. The fast chlorophyll fluorescence transients expose the damage to leaf photosynthetic activity under high temperatures. The method relies on the functioning of photosynthetic apparatus of plants under stress; however, these transients have been studied in detached leaves under controlled conditions. Still no reports are available on the potential usefulness of chlorophyll a fluorescence kinetics on intact wheat leaves for screening heat stress tolerant genotypes under field conditions. Hence, we conducted a study with the hypothesis that chlorophyll a fluorescence parameters and kinetics of plant-attached leaves under field conditions can be useful for screening of heat tolerant genotypes. The experimental population for testing the hypothesis consisted of 20 diverse wheat genotypes grown under timely and late sown environments (terminal heat stress) for two years. The results showed influence of high temperature on the expression of parameters Fo, Fv/Fo, Fv/Fm, and performance index. Analysis of the fast OJIP fluorescence transients indicated that the relative variable fluorescence between steps O and K and between steps O and J were related to high temperature stress tolerance. Five genotypes with consistent performance for better photosynthetic efficiency under thermal stress were observed. The inferences drawn from the present study supported our hypothesis that the analysis of chlorophyll a fluorescence transient parameters of plant attached leaves under field conditions can be used as a tool in the selection of wheat cultivars with better thermostability and functioning of photochemical reactions that could sustain photoassimilation and grain dry matter accumulation.en_US
dc.identifier.affiliationsDivision of Genetics, Indian Agricultural Research Institute, New Delhi-110 012, Indiaen_US
dc.identifier.affiliationsDivision of Plant Physiology, Indian Agricultural Research Institute, New Delhi-110 012, Indiaen_US
dc.identifier.citationJain Neelu, Singh GP, Pandey Rakesh, P Ramya, Singh PK, Nivedita, Prabhu KV. Use of scale for the growth study of Indian major carp (Cirrhinus mrigala Ham., 1822) in tropical freshwater. Indian Journal of Experimental Biology. 2018 Mar; 56(3): 202-206en_US
dc.identifier.issn0975-1009
dc.identifier.issn0019-5189
dc.identifier.placeIndiaen_US
dc.identifier.urihttps://imsear.searo.who.int/handle/123456789/190928
dc.languageenen_US
dc.publisherNISCAIR-CSIR, Indiaen_US
dc.relation.issuenumber3en_US
dc.relation.volume56en_US
dc.source.urihttps://nopr.niscair.res.in/handle/123456789/43662en_US
dc.titleChlorophyll fluorescence kinetics and response of wheat (Triticum aestivum L.) under high temperature stressen_US
dc.typeJournal Articleen_US
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