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- Title
根系修剪对积生长及相关基因表达的影响.
- Authors
黄冰明; 宋 放; 王 策; 姚京品; 王志静; 何利刚; 吴黎明; 游迎春
- Abstract
In this study, Poncirus trifoliata seedlings were chosen as the test materials. The effects of four different root pruning levels ( no cutting, cutting off 113 taproot, cutting off 112 taproot and cutting off 2/ 3 taproot ) on the plant growth, root architecture system and nutrient contents of Poncirus trifoliata seedlings were investigated by a repeated experiment for two years, and the expression of key genes involved in the lateral roots development was analyzed under root pruning treatments. The results showed that cutting off 112 taproot treatment enhanced the height, stem diameter, shoot and root fresh weights, and improved the root system architecture parameters ( the number of lateral roots, the total root length, the root surface area and average length), and also increased the contents of K, P, Ca, B, Fe, Na and Zn in roots of Poncirus trifoliata seedlings. In addition, quantitative real-time PCR (qRTPCR) revealed that the expression levels of lateral root development related genes HOXl and CYP2 were induced, but IAAl 1 and IAA13 were reduced under root pruning treatments. Overall, the moderate root pruning might regulate the development of lateral roots and improve the root architecture through up-regulating of HOXl and CYP2 genes, and down-regulating of IAA11 and /AA13 genes, thus leading to the improvement of nutrient absorption and growth of Poncirus trifoliata seedlings.
- Publication
Acta Agriculturae Zhejiangensis, 2021, Vol 33, Issue 2, p270
- ISSN
1004-1524
- Publication type
Article
- DOI
10.3969/j.issn.1004-1524.2021.02.10