Allelopathic effects of water extracts from different parts of Clematis brevicaudata on root growth and physiological characteristics of Robinia pseudoacacia seedlings
Journal Title: Journal of Henan Agricultural University - Year 2022, Vol 56, Issue 2
Abstract
[Objective] To explore the potential allelopathic effects of Clematis brevicaudata on the Robinia pseudoacacia seedlings and understand the interspecific relationship between Clematis brevicaudata and Robinia pseudoacacia plantation. [Method] The effects of water extracts from root, stem and leaf of C. brachyda with different concentrations (0, 5, 10, 20, 30, and 50 g·L-1) on root growth and physiological characteristic of R. pseudoacacia seedlings were compared and analyzed. [Results] The results showed that: (1) The allelopathy response degree of extracts from different tissues (root, stem and leaf) of C. brachiate on the of root growth and physiological characteristic of R. pseudoacacia were in different degrees. The root, stem and leaf extracts of C. brachiate could promote the root growth of R. pseudoacacia seedlings at<20 g·L-1, and the degree of effect was positively correlated with the mass concentration of the extracts. Compared to leaf extracts, the root and stem extracts had a better promoting effect on R. pseudoacacia seedlings at the same concentration. However, the root biomass of R. pseudoacacia seedlings was significantly reduced at a concentration of 50 g·L-1. (2) The extracts from three different parts of C. brachyda exhibited stronger effects on the content of root osmoregulation substances (soluble protein and malondialdehyde (MDA)) of R. pseudoacacia at 50 g·L-1. Compared with the control, the root soluble protein content in R. pseudoacacia was significantly decreased by 38.10%, 33.25% and 51.49% after treated by the three extracts of root, stem and leaf at 50 g·L-1, respectively (P<0.05). While the MDA content in the root of R. pseudoacacia was significantly increased by 38.09, 25.25 and 18.99 nmol·g-1, respectively (P<0.05). (3) The superoxide dismutase (SOD), peroxide enzyme (POD) and catalase (CAT) activities in roots of R. pseudoacacia seedlings were significantly increased when the concentration of the extracts was less than 20 g·L-1. However, the SOD, POD and CAT activities in roots were significantly lower than CK at the concentration of 50 g·L-1 (P<0.05). Simultaneously, this effect of stem extracts on SOD and CAT activities of R. pseudoacacia roots were greater than those of root and leaf extracts from C. brachyda. [Conclusion] Clematis brassica had allelopathic effect on Robinia pseudoacacia seedlings, and the stem extract of Clematis brassica had great influence on root growth and antioxidant enzymes of Robinia pseudoacacia seedlings.
Authors and Affiliations
Dongli YU, Shaoxin GUO, Zhipei FENG, Beibei FAN, Xitian YANG
Keywords
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- EP ID EP769039
- DOI 10.16445/j.cnki.1000-2340.20211011.001
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