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中国农学通报 ›› 2005, Vol. 21 ›› Issue (6): 227-227.

所属专题: 烟草种植与生产

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低磷胁迫对晒红烟内源激素和根系活力的影响

符云鹏,杨 燕,薛剑波   

  • 出版日期:2005-06-05 发布日期:2005-06-05

Influence under Low P-Deficient Stress on Endo Genous Hormone and Root Activities of Dark Sun-Cured Tobacco

Fu Yunpeng, YangYan, Xue Jianpo   

  • Online:2005-06-05 Published:2005-06-05

摘要: 通过盆栽试验和室内分析,研究低磷胁迫对晒红烟内源激素和根系活力的影响。结果表明,低磷胁迫下晒红烟的根系活力活性降低,根冠比及根和叶中生长素(IAA)含量均增加,干物质积累和细胞分裂素(ZR)含量则减少。低磷胁迫下,烟株为适应胁迫环境,IAA/ZR比值增大,促进了根系发育,使根冠比增大,以提高对磷的吸收效率,用来满足烟株对磷素的需求。

Abstract: By using pot tests, the effect of low-P stress on dark sun-cured tobacco endogenous hormone and root activities were studied during different growth stage. The results showed that root activities were decreased, root/shoot ratio and IAA in the root and leaves were high, dry weight and ZR in the root and leaves were low. The high IAA/ZR under P stress promote the root growth, and root /shoot ratio increased. So it can take in more P from soil in to resist unfavorable environment conditions.