Abstract
Tiller number is a major factor affecting rice grain yield.The endogenous hormone has substantial regulative effect on tillering of rice.However,little is known on the hormonal changes in releasing tillering bud.In this study,two indica rice cultivars were used with two treatments,removing panicle and retaining panicle,to investigate the pattern of hormonal changes during the period of dormant tillering bud sprouting.The result showed that the dormant tillering bud released and grew quickly after panicle removing.One day after removing panicle,the level of IAA in node and level of ABA in tillering bud decreased significantly,then the contents of these two hormones maintained at a constant level.The contents of Z+ZR in both node and bud increased significantly in panicle removing treatment.However,the content of IAA in the bud and the content of ABA in the node showed no significant difference between the two treatments.Further,the results showed that the ratio of hormones rather than a single hormone has the larger impact on tillering bud growth,with lower values of ABA/(Z+ZR) in bud and IAA/(Z+ZR) ratio in node showing beneficial effect whereas higher values of the two ratios demonstrating deleterious effect on tillering bud growth.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
