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CO2 ENRICHMENT IMPROVES RECOVERY OF GROWTH AND PHOTOSYNTHESIS FROM DROUGHT AND NITROGEN STRESS IN MAIZE

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dc.contributor.author ZONG, YUZHENG
dc.contributor.author SHANGGUAN, ZHOUPING
dc.date.accessioned 2023-01-05T07:40:36Z
dc.date.available 2023-01-05T07:40:36Z
dc.date.issued 2014-04-01
dc.identifier.citation Zong, Y., & Shangguan, Z. (2014). CO2 enrichment improves recovery of growth and photosynthesis from drought and nitrogen stress in maize. Pak. J. Bot, 46(2), 407-415. en_US
dc.identifier.issn 2070-3368
dc.identifier.uri http://142.54.178.187:9060/xmlui/handle/123456789/15686
dc.description.abstract In the context of the increasing risk of extreme drought as a result of climate change and increasing CO2 in the future of northwest China, evaluation of crops’ ability to recover and survive droughts requires further attention. To test the effects of re-watering on plants suffering water and nitrogen limitations in the presence of elevated CO2 , maize (Zea mays) was planted to experience combined elevated CO2 (380 or 750 µmolmol-1 , climate chamber), water stress (15% PEG-6000) and nitrogen limitation (5 or 15mM N in Hoagland solutions) and then re-watered at three levels (300mL, 600mL, 900mL per pot of distilled water). When plants were re-watered, drought stressed and N limited plants with ambient CO2 increased their water content more than that of elevated CO2 , while the enhancement of growth rate were negatively related to the increasing plant water content. Elevated CO2 could help re-watered seedlings to have higher photosynthetic capacity (Fv /Fm, ΦPSII, Pn ,Pn /Tr and Pn /Gs ) and new leaf growth under low water content, apart from nitrogen deficiency. The results demonstrated that elevated CO2 could help drought stressed seedlings to maintain higher carbon assimilation rates under low water content, as a result to improve leaf water use efficiency. en_US
dc.language.iso en en_US
dc.publisher Karachi: Pakistan Botanical Society en_US
dc.title CO2 ENRICHMENT IMPROVES RECOVERY OF GROWTH AND PHOTOSYNTHESIS FROM DROUGHT AND NITROGEN STRESS IN MAIZE en_US
dc.type Article en_US


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