Physiological and Gene Expression Changes of Clematis crassifolia and Clematis cadmia in Response to Heat Stress

• Published in: Frontiers in plant science Vol. 12; p. 624875
• Main Authors: Hu, Qingdi, Qian, Renjuan, Zhang, Yanjun, Zhang, Xule, Ma, Xiaohua, Zheng, Jian
• Format: Journal Article
• Language: English
• Published: Switzerland Frontiers Media S.A 26-03-2021
• Subjects: Clematis cadmia; Clematis crassifolia; gene expression; heat stress; physiological analysis; Plant Science; heat stress; Clematis cadmia; gene expression; physiological analysis; Clematis crassifolia
• ISSN: 1664-462X; 1664-462X
• DOI: 10.3389/fpls.2021.624875

is a superior perennial ornamental vine known for varied colors and shapes of its flowers.
is sensitive to high temperature, whereas
has a certain temperature adaptability. Here we analyzed the potential regulatory mechanisms of
and
in response to heat stress by studying the photosynthesis, antioxidant parameters, amino acids, and gene expression patterns under three temperature treatments. Heat stress caused the fading of leaves; decreased net photosynthetic rate, stomatal conductance, superoxide dismutase, and catalase activity; increased 13 kinds of amino acids content; and up-regulated the expression of seven genes, including C194329_G3, C194434_G1, and C188817_g1, etc., in
plants. Under the treatments of heat stress, the leaf tips of
were wilted, and the net photosynthetic rate and soluble protein content decreased, with the increase of 12 amino acids content and the expression of c194329_g3, c194434_g1, and c195983_g1. Our results showed that
and
had different physiological and molecular response mechanisms to heat stress during the ecological adaptation.