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INTEGRATION OF PHYSIO-BIOCHEMICAL PROCESSES AT DIFFERENT PHENOLOGICAL STAGES OF WHEAT (TRITICUM AESTIVUM L.) PLANTS IN RESPONSE TO HEAT STRESS

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dc.contributor.author JAVED, NAMRA
dc.contributor.author ASHRAF, MUHAMMAD
dc.contributor.author -AL-QURAINY, FAHAD
dc.contributor.author AKRAM, NUDRAT AISHA
dc.date.accessioned 2022-12-06T07:13:59Z
dc.date.available 2022-12-06T07:13:59Z
dc.date.issued 2014-12-30
dc.identifier.citation Namra, J., Muhammad, A., & Akram, N. A. (2014). Integration of physio-biochemical processes at different phenological stages of wheat (Triticum aestivum L.) plants in response to heat stress. Pakistan Journal of Botany, 46(6), 2143-2150. en_US
dc.identifier.issn 2070-3368
dc.identifier.uri http://142.54.178.187:9060/xmlui/handle/123456789/14766
dc.description.abstract A study was conducted to assess the influence of heat stress imposed at different growth stages of wheat (Triticum aestivum L.) plants. Four wheat cultivars namely S-24, Saher-2006, Lasani and AARI-10 were subjected to high temperature (HT) stress at tillering and booting phenological phases. Under stress conditions, root and shoot fresh weights, membrane thermostability (MTS) and non-photochemical quenching (NPQ) were significantly perturbed in all four wheat cultivars at both developmental stages. However, HT stress did not influence all the other attributes significantly including shoot fresh weight, chlorophyll a and b pigments, photosynthetic rate (A), leaf water (Ψw), internal CO2 (Ci), osmotic (Ψs) and turgor (Ψp) potentials, transpiration rate (E), water-use-efficiency (A/E), stomatal conductance (gs) as well as Fv/Fm ratio. Among all wheat cultivars, cv. Lasani performed better in shoot and root fresh weight, and chlorophyll a contents at the tillering stage, while in MTS at the booting phase, cv. S-24 in shoot fresh weight, E, and gs at the boot stage and highest MTS and WUE at the tillering stage. However, cv. AARI-10 performed well in root fresh weight, Ψw, Ψs, Ψp,,WUE and NPQ when stress was applied at the boot stage, while E and Fv/Fm in this cultivar on exposure to stress at the tillering stage. Cultivar Saher-2006 performed better in gs, leaf Ψs and Ψp at the tillering stage, while Fv/Fm was recorded better at the boot stage and A in the same cultivar at all growth stages. Overall, HT stress applied at different growth stages was only effective in altering root fresh weight, MTS and NPQ in all four wheat cultivars. Of all wheat cultivars, cv. AARI-10 performed better in growth and physiological attributes examined in the present study under HT stress applied at different phenological stages en_US
dc.language.iso en en_US
dc.publisher Karachi: Pakistan Journal of Botany , Botanical garden , University of Karachi en_US
dc.subject Growth en_US
dc.subject Stress en_US
dc.subject Metabolism en_US
dc.subject Physiology en_US
dc.subject wheat en_US
dc.title INTEGRATION OF PHYSIO-BIOCHEMICAL PROCESSES AT DIFFERENT PHENOLOGICAL STAGES OF WHEAT (TRITICUM AESTIVUM L.) PLANTS IN RESPONSE TO HEAT STRESS en_US
dc.type Article en_US


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