Photosynthetic characteristics and effects of exogenous glycine of Chorispora bungeana under drought stress

Title:

Photosynthetic characteristics and effects of exogenous glycine of Chorispora bungeana under drought stress

Creator:

Yang, N., Wang, C.-L., He, W.-P., Qu, Y.-Z., and Li, Y.-S.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:8363197d-aef2-4506-904a-ef7f5d549406
uuid:8363197d-aef2-4506-904a-ef7f5d549406
issn:0300-3604
doi:10.1007/s11099-016-0187-9

Subject:

fotosyntéza, photosynthesis, nitrogen, magnesium content, chlorophyll a/b ratio, electron transport, iron content, 2, and 581

Type:

model:article and TEXT

Format:

print, bez média, and svazek

Description:

We investigated the photosynthetic characteristics of Chorispora bungeana under conditions of drought stress caused by different concentrations of polyethylene glycol-6000 (PEG; 0, 5, 20, and 40%) and various concentrations of exogenous glycine (0, 5, 10, and 20 mM) with 20% PEG. We showed that moderate and severe drought stress of PEG reduced the chlorophyll (Chl) content (both Chl a and b), maximal quantum yield of PSII photochemistry (Fv/Fm), actual photochemical efficiency of PSII in light (YII), and quantum yield of regulated energy dissipation (YNPQ), while Chl a/b and quantum yield of nonregulated energy dissipation (YNO) increased. The low and moderate drought stress increased Mg2+ and Fe3+ contents, while a decrease in Mg2+ and Fe3+ was found under severe drought stress. Compared to sole PEG stress, the addition of exogenous 10 mM glycine increased Chl, Mg2+ and Fe3+ contents, Fv/Fm, YII, and YNPQ, and reduced YNO. On the contrary, 20 mM glycine showed an opposite effect, except for YNO. Our results proved that Chl contents and fluorescence parameters are reliable indicators for drought tolerance of C. bungeana. We suggest that a proper glycine content can relieve the effect of drought stress on C. bungeana., N. Yang, C.-L. Wang, W.-P. He, Y.-Z. Qu, Y.-S. Li., and Seznam literatury

Language:

Multiple languages

Rights:

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

Coverage:

459-467

Source:

Photosynthetica | 2016 Volume:54 | Number:3

Harvested from:

CDK

Metadata only:

false