Comparative effects of osmotic-, salt- and alkali stress on growth, photosynthesis, and osmotic adjustment of cotton plants

Title:

Comparative effects of osmotic-, salt- and alkali stress on growth, photosynthesis, and osmotic adjustment of cotton plants

Creator:

Chen, W., Feng, C., Guo, W., Shi, D., and Yang, C.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:e695c1ef-5d34-4055-9278-ba1e0004f638
uuid:e695c1ef-5d34-4055-9278-ba1e0004f638
issn:0300-3604
doi:10.1007/s11099-011-0042-y

Subject:

botanika, botany, alkali stress, cotton, osmotic stress, and salt stress

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

In this study, cotton seedlings were subjected to osmotic-, salt- and alkali stresses. The growth, photosynthesis, inorganic ions, and organic acids in the stressed seedlings were measured, to compare the mechanisms by which plants adapt to these stresses and attempt to probe the mechanisms by which plants adapt to high pH stress. Our results indicated that, at high stress intensity, both osmotic and alkali stresses showed a stronger injurious effect on growth and photosynthesis than salt stress. Cotton accumulated large amount of Na+ under salt and alkali stresses, but not under osmotic stress. In addition, the reductions of K+, NO3 -, and H2PO4 - under osmotic stress were much greater than those under salt stress with increasing stress intensity. The lack of inorganic ions limited water uptake and was the main reason for the higher injury from osmotic-compared to salt stress on cotton. Compared with salt- and alkali stresses, the most dramatic response to osmotic stress was the accumulation of soluble sugars as the main organic osmolytes. In addition, we found that organic acid metabolism adjustment may play different roles under different types of stress. Under alkali stress, organic acids might play an important role in maintaining ion balance of cotton; however, under osmotic stress, malate might play an important osmotic role. and W. Chen ... [et al.].

Language:

Multiple languages

Rights:

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

Coverage:

417-425

Source:

Photosynthetica | 2011 Volume:49 | Number:3

Harvested from:

CDK

Metadata only:

false