Response of photosynthesis to short-term drought stress in rice seedlings overexpressing C4 phosphoenolpyruvate carboxylase from maize and millet

Title:

Response of photosynthesis to short-term drought stress in rice seedlings overexpressing C4 phosphoenolpyruvate carboxylase from maize and millet

Creator:

Ding, Z. S., Sun, X. F., Huang, S. H., Zhou, B. Y., and Zhao, M.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:d00f0c1b-fbef-4bc3-93a4-eaa0b55dfcb3
uuid:d00f0c1b-fbef-4bc3-93a4-eaa0b55dfcb3
issn:0300-3604
doi:10.1007/s11099-015-0126-1

Subject:

fotosyntéza, photosynthesis, chlorophyll, chlorophyll fluorescence, gas exchange, photoprotection, stomatal opening, 2, and 581

Type:

model:article and TEXT

Format:

print, bez média, and svazek

Description:

Abiotic stresses induce phosphoenolpyruvate carboxylase (PEPC) expression in C3 plants which suggests PEPC function in plant adaptation to stresses. Here, we studied the response of photosynthesis to short-term drought stress in rice seedlings overexpressing C4 PEPC from maize and millet. The transgenic lines exhibited 1.2-5.5 fold of PEPC activities than the wild type before the treatment, while 1.5-8.5 fold after five or ten days of water deficit. Net photosynthetic rate (P N) declined less during the water stress and recovered more after rewatering in the transgenic lines. These changes were accompanied with changes in the stomatal conductance (g s). The lower decrease in P N and g s resulted in significantly higher intrinsic water use efficiency in the transgenic rice lines after ten days of water withdrawal. There were no significant differences between the wild type and transgenic lines in maximum photochemical efficiency of PSII and photochemical quenching. The nonphotochemical quenching and the quantum efficiency of PSII maintained both higher in transgenic lines than those in the wild type during drought stress. This indicated that the transgenic lines could dissipate more excess energy to heat to protect PSII. Our result suggested that the increased PEPC activities in rice could alleviate the decrease of photosynthesis during short-term drought stress., Z. S. Ding, X. F. Sun, S. H. Huang, B. Y. Zhou, M. Zhao., and Obsahuje seznam literatury

Language:

Multiple languages

Rights:

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

Coverage:

481-488

Source:

Photosynthetica | 2015 Volume:53 | Number:4

Harvested from:

CDK

Metadata only:

false