Effects of drought stress on growth and chlorophyll fluorescence of Lycium ruthenicum Murr. seedlings

Title:

Effects of drought stress on growth and chlorophyll fluorescence of Lycium ruthenicum Murr. seedlings

Creator:

Guo, Y.-Y., Yu, H.-Y., Kong, D.-S., Yan, F., and Zhang, Y.-J.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:b9ff704e-6011-49b4-9d5e-8bf1d066dfad
uuid:b9ff704e-6011-49b4-9d5e-8bf1d066dfad
issn:0300-3604
doi:10.1007/s11099-016-0206-x

Subject:

fotosyntéza, chlorofyl, photosynthesis, chlorophyll, tolerance sucha, relativní obsah vody, bazální průměr, koruna, list, kustovnice ruténská, drought tolerance, dry mass, relative water content, basal diameter, crown, chlorophyll fluorescence, leaf, nonphotochemical quenching, nonphotochemical quenching coefficient, 2, and 581

Type:

model:article and TEXT

Format:

print, bez média, and svazek

Description:

The present study aimed to determine effects of drought stress on Lycium ruthenicum Murr. seedlings. Our results showed that mild drought stress was beneficial to growth of L. ruthenicum seedlings. Their height, basal diameter, crown, leaf number, stem dry mass, leaf and root dry mass increased gradually when the soil water content declined from 34.7 to 21.2%. However, with further decrease of the soil water content, the growth of L. ruthenicum seedlings was limited. After 28 d of treatment, the seedlings were apparently vulnerable to drought stress, which resulted in significant leaf shedding and slow growth. However, growth was restored after rehydration. Drought treatments led to a decrease in contents of chlorophyll (Chl) a, b, and Chl (a+b) and increase in the Chl a/b ratio. After rewatering, the Chl content recovered to the content of the control plants. Under drought stress, minimal fluorescence and nonphotochemical quenching coefficient increased, thereby indicating that L. ruthenicum seedlings could protect PSII reaction centres from damage. Maximum fluorescence, maximum quantum yield, actual quantum yield of PSII photochemistry, and photochemical quenching decreased, which suggested that drought stress impacted the openness of PSII reaction centres. A comparison of these responses might help identify the drought tolerance mechanisms of L. ruthenicum. This could be the reference for the planting location and irrigation arrangements during the growing period of L. ruthenicum., Y.-Y. Guo, H.-Y. Yu, D.-S. Kong, F. Yan, Y.-J. Zhang., and Obsahuje bibliografii

Language:

Multiple languages

Rights:

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

Coverage:

524-531

Source:

Photosynthetica | 2016 Volume:54 | Number:4

Harvested from:

CDK

Metadata only:

false