Enhancing the thermotolerance of tomato seedlings by heat shock treatment

Z.Q.  YANG; C.  XU; M.T.  WANG; H.L.  ZHAO; Y.J.  ZHENG; H.J.  HUANG; F.  VUGUZIGA; M.A.  UMUTONI

doi:10.32615/ps.2019.127

Photosynthetica (Nov 2019)

Enhancing the thermotolerance of tomato seedlings by heat shock treatment

Z.Q. YANG,
C. XU,
M.T. WANG,
H.L. ZHAO,
Y.J. ZHENG,
H.J. HUANG,
F. VUGUZIGA,
M.A. UMUTONI

Affiliations

Z.Q. YANG: Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, Jiangsu Province, China
C. XU: Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, Jiangsu Province, China
M.T. WANG: Sichuan Meteorological Observatory, Chengdu, Sichuan Province, China
H.L. ZHAO: Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, Jiangsu Province, China
Y.J. ZHENG: Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, Jiangsu Province, China
H.J. HUANG: Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, Jiangsu Province, China
F. VUGUZIGA: Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, Jiangsu Province, China
M.A. UMUTONI: Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, Jiangsu Province, China

DOI: https://doi.org/10.32615/ps.2019.127
Journal volume & issue: Vol. 57, no. 4
pp. 1184 – 1192

Abstract

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The heat tolerance of tomato seedlings was significantly enhanced after heat shock treatment at 40°C for 4 h. Compared with the control, the heat-shocked tomato seedlings, on one hand, had a higher net photosynthetic rate (PN), stomatal conductance, intercellular CO2 concentration, water-use efficiency, maximal quantum yield of PSII photochemistry (Fv/Fm), electron transport rate, actual photochemical efficiency of PSII, and activity of antioxidant enzymes, on the other hand, had lower nonphotochemical quenching, relative conductivity, malondialdehyde content (MDA), and accumulation of reactive oxygen species (ROS). In addition, heat shock induced production of heat shock proteins (HSPs) in tomato seedling leaves. HSP70 was significantly negatively correlated with PN, Fv/Fm, catalase, superoxide dismutase, and peroxidase and was significantly positively correlated with MDA and ROS. Overall, short-term heat shock treatments, inducing the production of HSPs, helped improve the thermal tolerance of tomato seedlings.

chlorophyll fluorescence; high temperature stress; lipid peroxidation; lycopersicon esculentum; photoinhibition.

Published in Photosynthetica

ISSN: 0300-3604 (Print); 1573-9058 (Online)
Publisher: Academy of Sciences of the Czech Republic, Institute of Experimental Botany
Country of publisher: Czechia
LCC subjects: Science: Botany
Website: https://ps.ueb.cas.cz/

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