Responses of photosynthetic characteristics and antioxidative metabolism in winter wheat to post-anthesis shading

Title:

Responses of photosynthetic characteristics and antioxidative metabolism in winter wheat to post-anthesis shading

Creator:

Xu, C., Yin, Y., Cai, R., Wang, P., Ni, Y., Guo, J., Chen, E., Cai, T., Cui, Z., Liu, T., Yang, D., and Wang, Z.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:94590abe-6759-414a-b3e4-c41456f0fdf8
uuid:94590abe-6759-414a-b3e4-c41456f0fdf8
issn:0300-3604
doi:10.1007/s11099-013-0010-9

Subject:

botanika, botany, antioxidative metabolism, photosynthetic traits, shading, Triticum aestivum L., 2, and 58

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

In a field experiment, two winter wheat (Triticum aestivum L.) cultivars, Tainong 18 (a large-spike cultivar) and Jinan 17 (a multiple-spike cultivar), were treated with 78% (S1), 50% (S2), and 10% (S3) of full sunshine (S0, control) from anthesis to maturity to determine the responses of photosynthetic characteristics and antioxidative enzyme activities in a flag leaf. Compared with S0 treatment, the chlorophyll (Chl) content and maximal efficiency of photosystem II (PSII) photochemistry (Fv/Fm) of flag leaves were enhanced in treatments S1 and S2. From 0 to 7 d post flowering, the Chl content and Fv/Fm in S3 were also higher than those in S0, but significantly lower than those in controls, respectively. With the increase of shading intensity, the effective quantum yield of PSII (ΦPSII) was promoted; whereas, the ratio of Chl a/b declined. Compared with S0, treatments S2 and S3 significantly suppressed the activities of superoxide dismutase (SOD) and peroxidase (POD), net photosynthetic rate (PN), and contents of total soluble sugar, nevertheless, S1 treatment showed positive effects on the above parameters. Under the same shading condition, Jinan 17 had larger Chl content and higher activities of PSII and antioxidative enzymes, but lower malondialdehyde (MDA) content than Tainong 18. The results indicated that multiple-spike cultivar was more advantageous for the Huang-Huai-Hai Plain, where shading problem occurs later during the growth period, than the large-spike cultivar, because of the lesser damage in a flag leaf and better photosynthetic function of the former one. Wheat plants under S1 shading condition had relatively high activities of antioxidative enzymes and a low degree of membrane lipid peroxidation, which was in favor of stress resistance, maintaining high PN duration, and accumulation of photosynthates in wheat plants., C. Xu ... [et al.]., and Obsahuje bibliografii

Language:

Multiple languages

Rights:

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

Coverage:

139-150

Source:

Photosynthetica | 2013 Volume:51 | Number:1

Harvested from:

CDK

Metadata only:

false