Photosynthesis and yield responses of ozone-polluted winter wheat to drought

Title:

Photosynthesis and yield responses of ozone-polluted winter wheat to drought

Creator:

Xu, H., Biswas, D. K., Li, W.-D., Chen, S.-B., Zhang, L., Jiang, G.-M., and Li, Y.-G.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:ceaecbc5-e943-4dfc-a453-b81cd184290b
uuid:ceaecbc5-e943-4dfc-a453-b81cd184290b
issn:0300-3604
doi:10.1007/s11099-007-0100-7

Subject:

air pollution, chlorophyll a fluorescence, gas exchange, intercellular CO2 concentration, stomatal conductance, transpiration rate, Triticum aestivum L., and water management

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Winter wheat (Triticum aestivum L. cv. Jingdong 8) was exposed to short-term high ozone treatment after anthesis and then was either well irrigated with soil water content (SWC) of 80-85 % (O3+W) or drought treated (SWC 35-40 %, O3+D). Short-term ozone exposure significantly decreased irradiance-saturated net photosynthetic rate (PN) of winter wheat. Under good SWC, PN of the O3-treated plant was similar to that of control on 2 d after O3-exposure (6 DAA), but decreased significantly after 13 DAA, indicating that O3 exposure accelerated leaf senescence. Meanwhile, green flag leaf area was reduced faster than that of control. As a result, grain yield of O3+W was significantly decreased. PN of O3+D was further notably decreased and green flag leaf area was reduced more than that in O3+W. Consequently, substantial yield loss of O3+D was observed compared to that of O3+W. Although PN was significantly positively correlated with stomatal conductance, it also had notable positive correlation with the maximum photochemical efficiency in the dark adapted leaves (Fv/Fm), electron transport rate (ETR), photochemical quenching (qP), as well as content of chlorophyll, suggesting that the depression of PN was mainly caused by non-stomatal limitation. Hence optimal soil water condition should be considered in order to reduce the yield loss caused by O3 pollution. and H. Xu ... [et al.].

Language:

Multiple languages

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

582-588

Source:

Photosynthetica | 2007 Volume:45 | Number:4

Harvested from:

CDK

Metadata only:

false