断根对去叶黑麦草地上补偿性生长的影响
The Effect of Root-Breaking on Aboveground Compensatory Growth of Ryegrass
DOI: 10.12677/BR.2018.76067, PDF,    国家自然科学基金支持
作者: 崔中佳, 郑 岩, 兰 菲, 王丽莹, 唐铭欣, 王晓凌：河南科技大学农学院，河南 洛阳
关键词: 黑麦草；去叶再生；地上补偿性生长；细胞分裂素；Ryegrass； Regrowth after Clipping； Aboveground Compensatory Growth； Cytokinin
摘要: 以根诱导的叶片细胞分裂素为基础，以期通过断根措施来揭示根系对去叶黑麦草地上部分补偿性生长的影响。试验包括3个处理：1) 去叶且不断根(HF)；2) 去叶留5厘米的茬高且断根(HS)；3) 没有去叶(CK)。结果表明，在再生期间，HF处理的地上生物量显着高于HS处理，表现出较强的再生能力，并且地上补偿性生长还发生在HF处理。在再生的早期，HS处理叶片中较高的细胞分裂素含量促进了其根系的生长。在再生期后期，HF处理叶片中较高的细胞分裂素含量促进了其再生。较高的细胞分裂素从根系到叶片的输送速率，导致黑麦草片中较高的细胞分裂素含量水平。总之，完善的根系功能和根系诱导的叶片细胞分裂素对黑麦草地上补偿性生长起着关键性的调控作用。
Abstract: Based on root-induced cytokinin, the effect of root on aboveground compensatory growth of ryegrass was investigated by root-breaking. The experiment comprised three treatments: 1) clipping without root-breaking (HF), 2) clipping with root-breaking (HS), 3) no clipping (CK). Results showed that aboveground biomasses were significantly higher in HF treatment than in HS treatment during the regrowth period, which indicated that strong regrowth ability was in the HF treatment. In addition, aboveground compensatory growth occurred in the HF treatment. In the early regrowth period, the high leaf cytokinin content in HS treatment increased its root growth. In the later regrowth period, the high leaf cytokinin content in HF treatment increased its leaf growth. The higher cytokinin transport rate from rots to leaves increased leaf cytokinin content. In a word, integrated root function and root-induced leaf cytokinin play a key role on the aboveground compensatory growth of ryegrass.
文章引用：崔中佳, 郑岩, 兰菲, 王丽莹, 唐铭欣, 王晓凌. 断根对去叶黑麦草地上补偿性生长的影响[J]. 植物学研究, 2018, 7(6): 550-557. https://doi.org/10.12677/BR.2018.76067

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