Photosynthetic responses of wheat (Triticum aestivum L.) to combined effects of drought and exogenous methyl jasmonate

Title:

Photosynthetic responses of wheat (Triticum aestivum L.) to combined effects of drought and exogenous methyl jasmonate

Creator:

Ma, C., Wang, Z. Q., Zhang, L. T., Sun, M. M., and Lin, T. B.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:d47ea6ef-a37e-4cc1-8abb-6e187d923223
uuid:d47ea6ef-a37e-4cc1-8abb-6e187d923223
issn:0300-3604
doi:10.1007/s11099-014-0041-x

Subject:

fotosyntéza, pšenice, photosynthesis, wheat, antioxidant enzyme, gas exchange, stomatal behavior, water stress, methyl jasmonate, Triticum aestivum L, 2, and 581

Type:

model:article and TEXT

Format:

print, bez média, and svazek

Description:

Drought stress limits wheat growth and productivity. The response of wheat (Triticum aestivum L.) to different water supply conditions (well-watered and drought-stressed) and exogenous methyl jasmonate (MeJA; 0 and 0.25 μM) was studied. The application of MeJA enhanced wheat adaptability to drought stress by physiological and metabolic adjustments. Drought stress reduced net photosynthetic rate (PN), stomatal conductance (gs), transpiration rate (E), and water-use efficiency (WUE) in wheat. The application of exogenous MeJA decreased also gs and E, but stimulated WUE. Meanwhile, MeJA mitigated the decline of PN, gs, and WUE induced by drought stress and midday depression by 6-183%. Both drought stress and exogenous MeJA induced stomatal closure, which improved water status and delayed plant senescence. MeJA enhanced the activities of superoxide dismutase, peroxidase, catalase, and reduced malondialdehyde content. PN-PAR response curves showed that MeJA mitigated the decline of maximum PN, apparent quantum yield, and saturation irradiance, and the increase of compensation irradiance. Drought stress and exogenous MeJA increased dark respiration rate and showed an additive effect. These results indicated that 0.25 μM MeJA enhanced the photosynthesis under drought stress mainly by improving the water status and antioxidant capacity of wheat., C. Ma, Z. Q. Wang, L. T. Zhang, M. M. Sun, T. B. Lin., and Obsahuje bibliografii

Language:

Multiple languages

Rights:

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

Coverage:

377-385

Source:

Photosynthetica | 2014 Volume:52 | Number:3

Harvested from:

CDK

Metadata only:

false