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PHYSIOLOGICAL INDEXES OF POPULUS EUPHRATICA LEAVES FROM DIFFERENT CANOPY POSITIONS IN THE LOWER REACHES OF TARIM RIVER

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dc.contributor.author YU, PUJIA
dc.contributor.author XU, HAILIANG
dc.contributor.author SHI, WEI
dc.contributor.author LIU, SHIWEI
dc.contributor.author ZHANG, QINGQING
dc.contributor.author ZHAO, XINFENG
dc.contributor.author ZHENG, WEI
dc.contributor.author ZHANG, PENG
dc.date.accessioned 2022-12-19T10:50:50Z
dc.date.available 2022-12-19T10:50:50Z
dc.date.issued 2012-06-14
dc.identifier.citation Yu, P., Xu, H., Shi, W., Liu, S., Zhang, Q., Zhao, X., ... & Zhang, P. (2012). Physiological indexes of Populus euphratica leaves from different canopy positions in the lower reaches of Tarim River. Pak. J. Bot, 44(3), 933-938. en_US
dc.identifier.issn 2070-3368
dc.identifier.uri http://142.54.178.187:9060/xmlui/handle/123456789/15312
dc.description.abstract Populus euphratica have serious degeneration under the long-term stress in the lower reaches of Tarim River and many trees began to wither from upper canopy to lower canopy. In this paper, differences in physiological indexes of Populus euphratica leaves between upper canopy, middle canopy and lower canopy, which response to the external stress were studied. The results showed that the contents of water (RWC), soluble sugar (SS), free proline (Pro) and the activities of peroxidase (POD) decreased from lower canopy to upper canopy, while the content of malondialdehyde (MDA), the activities of superoxide dismutase (SOD) and the ratio of chlorophyll a and chlorophyll b (Chl a/b) increased. These results indicated that the external stress on the upper canopy was higher than the middle and lower canopy. That may be the main reason resulting in the death of the upper canopy. The contents of chlorophyll a (Chla), chlorophyll b (Chlb) and total chlorophyll (Chlt) were slightly higher in the middle canopy than in other canopies, indicating the ability of absorbing light was same in canopies. These findings from this study will contribute to the best management of Populus euphratica. en_US
dc.language.iso en en_US
dc.publisher Karachi: Pakistan Botanical Society en_US
dc.title PHYSIOLOGICAL INDEXES OF POPULUS EUPHRATICA LEAVES FROM DIFFERENT CANOPY POSITIONS IN THE LOWER REACHES OF TARIM RIVER en_US
dc.type Article en_US


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