Effects of rhizome age on endogenous hormone contents and antioxidative enzyme activities of Chimonobambusa utilis rhizomes

doi:10.14088/j.cnki.issn0439-8114.2025.11.015

Abstract

Abstract: The bamboo forest of Chimonobambusa utilis,which had been bred for 10 years derived from a one-year-old ramet, was used as the research object. Rhizome samples were collected by the method of tracing rhizomes, and its contents of endogenous hormones and antioxidant system indexes were determined to analyze age effects of the physiological characteristics in rhizome elongation. The results showed that, to the whole rhizome, contents of ABA increased with the increase of rhizome age, while contents of GA, IAA and ZR had no significant change. The values of IAA/ABA, ZR/ABA, GA/ABA, (IAA+ZR+GA)/ABA decreased with the increase of rhizome age. With the increase of rhizome age, SOD activity increased first and then decreased, POD activity increased first and then stabilized, and MDA content decreased gradually. There was no significant difference in forepart, middle and posterior of the rhizome at the same age. The variation law of each index in different rhizome positions with age was different due to different indexes. When the rhizomes of different ages were connected, changes of ABA content, values of hormone ratio and MDA content with the increase of age were different with different connected segments, and other indexes had no significant changes. SOD, CAT and MDA were significantly negatively correlated with ABA and IAA, while POD and CAT were significantly positively correlated with GA. This study provided a theoretical basis for further exploring the role of bamboo rhizomes in the development of bamboo forests.

Key words: Chimonobambusa utilis, rhizome, rhizome age, rhizome elongation, endogenous hormone, antioxidative enzyme

CLC Number:

S795

SU Chun-hua, LIN Xin-xiao, LOU Yi-long, XIE Gang. Effects of rhizome age on endogenous hormone contents and antioxidative enzyme activities of Chimonobambusa utilis rhizomes[J]. HUBEI AGRICULTURAL SCIENCES, 2025, 64(11): 119-126.

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