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首页> 外文期刊>Plant Growth Regulation >Effects of cold stratification, temperature, light and salinity on seed germination and radicle growth of the desert halophyte shrub, Kalidium caspicum (Chenopodiaceae)
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Effects of cold stratification, temperature, light and salinity on seed germination and radicle growth of the desert halophyte shrub, Kalidium caspicum (Chenopodiaceae)

机译：冷分层，温度，光照和盐度对荒漠盐生植物灌木（藜科）的种子萌发和胚根生长的影响

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摘要

We tested the effects of cold stratification, temperature, light and NaCl on seed germination and germination recovery and of NaCl on radicle growth and radicle elongation recovery of Kalidium caspicum, a small leafy succulent shrub dominant in saline deserts in northwest China. In all conditions of temperature and light/darkness, germination percentages and rates of cold-stratified seeds were significantly higher than those of nonstratified seeds. Germination of a high percentage of both nonstratified and stratified seeds was inhibited by 0.2 M NaCl, and 0.6 M NaCl completely inhibited germination. Nongerminated seeds germinated after they were transferred from NaCl solutions to distilled water. Radicle elongation significantly decreased with increase in salinity, and it was completely inhibited by ≥1.0 M NaCl; radicle elongation recovered in young seedlings pretreated by 10 days of incubation in ≤0.4 M NaCl. Results show that seed germination and early seedling growth of K. caspicum are salt tolerant, and these characteristics help explain why this species can survive and dominate salt habitats, such as those in the Junggar desert in Xinjiang, northwest China.
机译：我们测试了冷分层，温度，光照和NaCl对种子发芽和发芽恢复的影响，以及NaCl对小叶多肉灌木（多叶灌木，多叶灌木在中国西北盐碱沙漠中生长）的根系生长和根系伸长恢复的影响。在所有温度和光照/黑暗条件下，冷复层种子的发芽率和发芽率均显着高于非复层种子。 0.2 M NaCl抑制了高百分比的非分层和分层种子的萌发，而0.6 M NaCl则完全抑制了发芽。未发芽的种子从NaCl溶液转移到蒸馏水中后发芽。根系伸长随盐度的增加而显着降低，并被≥1.0M NaCl完全抑制。在≤0.4M NaCl中培养10天后预处理的年轻幼苗恢复了胚根的伸长。结果表明，Cas。caspicum的种子发芽和幼苗早期生长耐盐，这些特征有助于解释为什么该物种能够生存并控制盐生境，例如中国西北部的准gar尔沙漠。

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