|Table of Contents|

Effects of Drought Stress on Photosynthetic Fluorescence Parameters of Hippophae rhamnoides ssp.Russia Seedlings

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2022年22
Page:
16-23
Research Field:
Publishing date:

Info

Title:
Effects of Drought Stress on Photosynthetic Fluorescence Parameters of Hippophae rhamnoides ssp.Russia Seedlings
Author(s):
LIU Gechang1; YUE Lihua2; LIU Chunhai2; ZHAO Pengzhi2; DENG Ziyi3; LI Yuling3
(1.Hebei Yonglin Forestry Technology Service Co.Ltd.，Shijiazhuang，Hebei 050000;2.Chengde Aerospace Mountain Plant Application Technology Co.Ltd.，Chengde，Hebei 068450;3.College of Forestry，Hebei Agricultural University，Baoding，Hebei 071001)
Keywords:
Hippophae rhamnoides ssp.Russia; drought stress; photosynthetic parameters; fluorescenceparameters
PACS:
-
DOI:
10.11937/bfyy.20221629
Abstract:
Taking the biennial Hippophae rhamnoides ssp.Russia seedlings as the test materials，the indoor potted water control test method was used，and four drought stress levels of contrast (CK)，light (LS)，moderate (MS) and severe (SS) were set.The effects of drought stress on the photosynthetic characteristics of Hippophae rhamnoides ssp.Russia were studied,in order to provide reference for its standardized cultivation technology and reasonable development scale.The results showed that with the increasing of drought stress and the extension of drought stress time，the net photosynthetic rate，transpiration rate and stomatal conductance of Hippophae rhamnoides ssp.Russia decreased gradually，and the water use efficiency increased gradually，and their intercellular CO2 concentration increased first and then decreased.However, the water use efficiency gradually increased,while CK indicators did not change significantly,and there was a significant difference between SS and LS and MS.Under drought stress (LS，MS and SS)，the potential activity of PSⅡ，the maximum photochemical quantum yield of PSⅡ，the photochemical quenching coefficient，the nonphotochemical quenching coefficient，the apparent photosynthetic electron transfer efficiency and the actual photochemical quantum yield of PSⅡ decreased gradually with the increasing of drought stress and the extension of drought stress time，and there was no significant change for the four fluorescence parameters of CK treatment.Photosynthesis, transpiration and stomatal conductance of Hippophae rhamnoides ssp. Russia under MS and SS drought stress were closely related. Photosynthesis, transpiration, stomatal conductance and fluorescence parameters were also significantly correlated under MS stress.

References:

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Last Update: 2023-01-17