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- Title
Gender-specific differences in growth and defense of one-year-old Salix viminalis seedlings.
- Authors
ZHAI Feifei; MAO Jinmei; LI Haidong; ZHANG Yunxing; LI Zhenjian; LIU Junxiang; LI Xia; SUN Zhenyuan
- Abstract
[Objective] This study investigated sexual differences in growth and defense of Salix viminalis seedlings in different growing stages to provide guidance for gender difference research and selective application of male and female plants in practice. [Method] Male and female one-year-old cutting seedlings of S. viminalis were selected, and the growth, photosynthetic parameters, photosynthetic pigment contents, chemical defense substance content and defense enzyme activities were measured and analyzed with the design of completely randomized blocks under field experiment conditions on June 5, July 3, August 4, September 7 and October 5. [Result] There were no significant gender differences in plant height in June and ground diameter in June and July, but the height and ground diameter of male plants were significantly higher than those of female plants at other dates. The net photosynthetic rate (Pn) and transpiration rate (Tr) showed no significant gender difference in June, while the Pn and Tr of male plants were significantly higher than those of female plants from July to October. The stomatal conductance (Gs) showed no significant gender difference from June to September, while the Gs of male plants was significantly higher than that of female plants in October. The intercellular CO2 concentration (Ci) showed no significant gender difference from June to October. The contents of chlorophyll a (Chi a), chlorophyll b (Chi b) and carote-noid (Car) showed no significant gender difference in June, while the photosynthetic pigment contents of male plants were significantly higher than those of female plants from July to October. There was no significant difference in contents of secondary metabolites (polyphenols and tannins) between males and females from June to October, but the activities of SOD (except for June), POD, PPO and PAL (except for June) in male were significantly higher than those in female. [Conclusion] In the natural environment with stress factors, there was no significant differences in secondary metabolites between male and female plants. Female plants grew slower and showed lower defense enzyme activity, indicating an evolutionary trade-off between reproduction and growth and defense. Male plants of S. viminalis can be selected preferentially in practical application as they grew faster without the catkins problem.
- Publication
Journal of Northwest A & F University - Natural Science Edition, 2022, Vol 50, Issue 8, p46
- ISSN
1671-9387
- Publication type
Article
- DOI
10.13207/j.cnki.jnwafu.2022.08.006