Chinese Bulletin of Botany >

2022 , Vol. 57 >Issue 2: 209 - 216

DOI: https://doi.org/10.11983/CBB21122

EXPERIMENTAL COMMUNICATIONS

Effects of High Air and Root Zone Temperature on Photosynthetic Fluorescence Characteristics of Grape Leaves

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  • 1Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production in Shandong, State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an 271018, China
    2Daiyue District Bureau of Agriculture and Rural Areas, Tai’an City, Shandong Province, Tai’an 271021, China

Received date: 2021-07-25

  Accepted date: 2021-12-28

  Online published: 2021-12-28

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Abstract

In order to explore the effects of different air and root zone temperature stress on the fluorescence characteristics of grape (Vitis vinifera) leaves, we treated potted annual Kyoho seedlings under four different temperature conditions: control (C), high air temperature (HA), high root zone temperature (HR), and combined treatment (CT) of HA and HR. Our results showed that the maximum photochemical efficiency (Fv/Fm) under HR and CT treatments was more significantly reduced than under C and HA conditions. The actual quantum efficiency Y(II) of the PSII under HR and CT were significantly reduced, while the quantum yield Y(NPQ) of the non-adjusted energy dissipation, and the redox state of QA (1-qp) were significantly increased compared with the control. At the same time, the variable fluorescence (Vj) of the J point was increased significantly under HR and CT treatments, while the quantum yield (φEo) used for electron transfer and the performance index based on absorption of light energy (PIABS) were significantly reduced. In addition, the number of active reaction centers per unit area (RC/CSm) under HR and CT treatments was decreased significantly, while the relative variable fluorescence (Wk) after normalization was increased significantly. Taken together, our study indicated that high temperature in root zone is a key stress affecting leaf fluorescence characteristics by causing damage on the PSII receptor side. High air temperature aggravated the damage on PSII caused by high root zone temperature.

Key words： grapes; high air temperature; high root zone temperature; chlorophyll fluorescence

Cite this article

Hao Wang, Ming Wang, Ting Liang, Yuxin Yao, Yuanpeng Du, Zhen Gao . Effects of High Air and Root Zone Temperature on Photosynthetic Fluorescence Characteristics of Grape Leaves[J]. Chinese Bulletin of Botany, 2022 , 57(2) : 209 -216 . DOI: 10.11983/CBB21122

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