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Effects of Thidiazuron on Soybean Seeds Morphogenesis and Physiological Indexes of Nitrogen Metabolism(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2022年06期
Page:
718-725
Research Field:
Publishing date:

Info

Title:
Effects of Thidiazuron on Soybean Seeds Morphogenesis and Physiological Indexes of Nitrogen Metabolism
Author(s):
HE Rui1WANG Qing-yan12FAN Qi1FANG Shu-mei2LIANG Xi-long12
(1.College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing 163319, China; 2.Heilongjiang Plant Growth Regulator Engineering Technology Research Center, Daqing 163319, China)
Keywords:
thidiazuron soybean seeds formation nitrogen metabolism yield
PACS:
-
DOI:
10.11861/j.issn.1000-9841.2022.06.0718
Abstract:
To explore the effects of plant growth regulator thidiazuron on soybean seeds formation and nitrogen metabolism, the effects of plant growth regulator thidiazuron on soybean seeds formation and nitrogen metabolism were explored in this study. Soybean cultivar Dongnongdou 252 was used as the material. The different concentrations (0.2, 1.0 and 5.0 mg·L-1) of thidiazuron were sprayed on the foliar surface under pot conditions. Soybean yield, seed shape, key enzyme activities of nitrogen metabolism, soluble protein content and amino acid content were measured. The results showed that thidiazuron treatment significantly increased the soybean seeds yield per plant, and the treatments of 0.2, 1.0 and 5.0 mg·L-1 significantly increased by 14.28%, 14.89% and 14.29% compared with the control, respectively. The improvement of soybean yield per plant of thidiazuron treatment was attributed to the increase of the pods number per plant on the one hand, and the increase of seeds weight on the other hand. At 45 d after treatment, the dry weight of seeds in the treatments of 0.2, 1.0 and 5.0 mg·L-1 increased significantly by 11.15%, 11.51% and 10.08%, respectively, compared with the control. In terms of nitrogen metabolism, thidiazuron treatment, especially 0.2-1.0 mg·L-1 concentration treatments, on the one hand, improved the activity of key enzymes in nitrogen metabolism in soybean leaves and promoted the early stage of seeds formation (9-18 d after thidiazuron treatment), accumulation of soluble protein and free amino acids in leaves. On the other hand, the transfer of nitrogen from leaves to seeds was promoted, and the free amino acid content of soybean leaves at the later stage of seeds formation (36-45 d after treatment) was significantly lower than that of the control. In turn, the level of seed nitrogen metabolism was improved, the activity of key enzymes in seed nitrogen metabolism was increased, and the accumulation of seed soluble protein and free amino acids were increased. In conclusion, thidiazuron treatment can improve soybean leaf nitrogen metabolism, promote nitrogen transfer to seeds and accumulate, increase soybean seeds dry weight, and achieve the effect of yield increasing. Among them, the treatment effect of thidiazuron in the concentration range of 0.2-1.0 mg·L-1 was the best.

References:

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Last Update: 2022-11-29