植物研究 ›› 2024, Vol. 44 ›› Issue (5): 721-729.doi: 10.7525/j.issn.1673-5102.2024.05.009
• 生理与生态 • 上一篇
彭广州1, 刘建飞1, 王巧欣1, 付可琢1, 张烨1, 张晨曦1, 詹亚光1,2()
收稿日期:
2024-04-15
出版日期:
2024-09-20
发布日期:
2024-09-24
通讯作者:
詹亚光
E-mail:yaguangzhan@126.com
作者简介:
彭广州(1997—),男,硕士研究生,主要从事林木繁育和遗传改良研究。
基金资助:
Guangzhou PENG1, Jianfei LIU1, Qiaoxin WANG1, Kezhuo FU1, Ye ZHANG1, Chenxi ZHANG1, Yaguang ZHAN1,2()
Received:
2024-04-15
Online:
2024-09-20
Published:
2024-09-24
Contact:
Yaguang ZHAN
E-mail:yaguangzhan@126.com
摘要:
为解决水曲柳(Fraxinus mandshurica)因年龄效应而导致的插穗生根能力在3年生后显著下降的问题,以4年生水曲柳实生苗为研究对象,探究循环扦插复幼对克服年龄效应的作用,尤其是循环次数和截干处理2个关键因素对水曲柳萌蘖、生长和扦插生根的影响,以及循环复幼过程中水曲柳的生理变化。结果表明:循环复幼次数的增加和截干处理都能提高水曲柳的复幼程度,呈现萌生枝数量增加、枝条细化、茎节缩短的特征,同时显著提高扦插再生能力。在循环复幼次数达到3次且叠加截干处理时,与未循环复幼相比萌枝数量提高了6.56倍,生根率提高了7.44倍。循环复幼1~3次,植株生长素吲哚乙酸(IAA)、细胞分裂素(CTK)水平提高,赤霉素(GA3)水平在第3次时才显著提升,而脱落酸(ABA)水平呈逐渐下降趋势;循环复幼后植株中过氧化氢酶(CAT)、过氧化物酶(POD)、超氧化物歧化酶(SOD)活性降低,丙二醛(MDA)和可溶性糖含量减少。这些生理指标变化都与植株幼化状态相符。可见,循环复幼可有效恢复幼化状态,诱导水曲柳形成较高IAA、GA3和较低ABA水平的萌枝,同时降低了抗氧化酶活性、MDA与可溶性糖含量,有利于实现水曲柳复幼,从而提高扦插生根率,实现水曲柳良种的快速高效无性繁殖。
中图分类号:
彭广州, 刘建飞, 王巧欣, 付可琢, 张烨, 张晨曦, 詹亚光. 循环复幼对水曲柳生长繁殖及生理的影响[J]. 植物研究, 2024, 44(5): 721-729.
Guangzhou PENG, Jianfei LIU, Qiaoxin WANG, Kezhuo FU, Ye ZHANG, Chenxi ZHANG, Yaguang ZHAN. Effects of Cycle Rejuvenation on Growth, Reproduction and Physiology of Fraxinus mandshurica[J]. Bulletin of Botanical Research, 2024, 44(5): 721-729.
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