关键词: 毛葡萄, 气候适宜性, 刺葡萄, 主导气候因子, 最大熵模型

Abstract: We tested whether exogenous uniconazole (S₃₃₀₇) would ameliorate salt injury to soybean seedlings by regulating anatomical structure in roots, with Glycine max cultivar ‘Zhonghuang 13’ as the experimental material. The results showed that after spraying S₃₃₀₇ on salt-stressed soybean, the salt-induced declined parameters, including plant height, root length, dry and fresh weight of roots and shoots, relative growth rate, leaf area, and pith diameter, were markedly recovered, while the salt-induced ascended parameters, including Cl^- content, root/shoot ratio, cortex thickness and ray length, were decreased to levels between that in the control and the saltstressed seedlings. Partial deformation and invagination of salt-stressed epidermal cells recovered to the control level, with no tylosis being found in vessel elements. Spraying S₃₃₀₇ reduced the metabolic cost of roots by decreasing cortex thickness in roots, and shortened the distance of water absorption from root to vascular cylinder. Additionally, increased pith diameter was beneficial to nutrient storage, and reduced ray length shortened the lateral transport distance of nutrients in roots. Meanwhile, a significant reduction in Cl^- contents in roots and shoots could greatly relieve the chlorine toxicity to soybean seedlings under salt stress. In conclusion, S₃₃₀₇application could ameliorate salt injury by regulating anatomical structure in soybean roots.

Key words: Vitis heyneana, climatic suitability, Vitis davidii, dominant climatic factor, maximum entropy model (MaxEnt)