Adaptive photosynthetic and physiological responses to drought and rewatering in triploid Populus populations

Title:

Adaptive photosynthetic and physiological responses to drought and rewatering in triploid Populus populations

Creator:

Liao, T., Wang, Y., Xu, C. P., Li, Y., and Kang, X. Y.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:86321150-50e1-4e78-9005-1feb85c4afe4
uuid:86321150-50e1-4e78-9005-1feb85c4afe4
issn:0300-3604
doi:10.1007/s11099-017-0704-5

Subject:

topol, populace (biologie), poplar, population (biology), chlorofylová fluorescence, výměna plynu, malondialdehyd, stomatální omezení, deficit vody, sucho, chlorophyll fluorescence, gas exchange, malondialdehyde, stomatal limitation, water deficit, drought, 2, and 581

Type:

model:article and TEXT

Format:

print, bez média, and svazek

Description:

Cuttings of Populus cathayana Rehd, originating from three triploid and one diploid populations with the same parents but different gamete origins, were used to examine physiological responses to drought stress and rewatering by exposure to three progressive water regimes. Progressive drought stress significantly decreased the leaf relative water content (RWC), photosynthesis, and chlorophyll fluorescence parameters, and increased the relative electrolyte leakage, malondialdehyde (MDA), free proline (Pro), and antioxidant enzymes, such as superoxide dismutase, peroxidase, and catalase, in the four populations evaluated. However, compared to the diploid population, triploid populations showed lower relative electrolyte leakage and MDA, higher RWC and Pro content, and more efficient photosynthesis and antioxidant systems under the same water regime. Our data indicated that triploid populations possessed more efficient protective mechanisms than that of diploid population with gradually increasing drought stress. Moreover, some triploid genotypes were less tolerant to water stress than that of diploids due to large intrapopulation overlap., T. Liao, Y. Wang, C. P. Xu, Y. Li, X. Y. Kang., and Obsahuje bibliografii

Language:

Multiple languages

Rights:

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

Coverage:

578-590

Source:

Photosynthetica | 2018 Volume:56 | Number:2

Harvested from:

CDK

Metadata only:

false