Drought inhibition of tillering in Festuca arundinacea associated with axillary bud development and strigolactone signaling
Drought inhibition of tillering in Festuca arundinacea associated with axillary bud development and strigolactone signaling
复制标题
干旱对高羊茅分蘖的抑制与腋芽发育和独脚金内酯信号传导相关
DOI：
10.1016/j.envexpbot.2017.07.017
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发表时间：
2017-10
影响因子：
5.7
通讯作者：
Huang Bingru
中科院分区：
文献类型：
--
作者：
Zhuang Lili;Wang Jian;Huang Bingru
干旱胁迫抑制分蘖的形成和生长，但其机制还不清楚。单子叶植物和双子叶植物的分蘖和侧枝分支生长分别经历腋芽发生和随后的生长两个阶段。本研究的目的是调查干旱抑制分蘖生长是否主要是由于抑制腋芽的启动或随后的生长在多年生禾本科植物，并确定干旱抑制分蘖的发展和生长在禾本科植物与独脚金内酯（SL）的积累和信号。将具有一片完全展开的叶而无腋芽的幼苗和具有三片完全展开的叶而有两个腋芽的幼苗生长在20%聚乙二醇（PEG）溶液中以诱导干旱胁迫。在21 d胁迫期间，对植株高度、叶片数、腋芽数、分蘖数和腋芽长度进行了监测。干旱胁迫抑制腋芽的发生和生长，与生长更敏感的干旱胁迫。qRT-PCR分析表明，干旱胁迫14 d后，与腋芽活性相关的基因表达量下调，与腋芽休眠相关的基因表达量上调。干旱胁迫下，冠层独脚金内酯（SL）含量增加。qRT-PCR分析表明，干旱胁迫下，参与SL生物合成和信号转导的基因表达水平上调。腋芽生长对干旱胁迫敏感，可能与SL信号有关，有助于干旱抑制多年生禾本科植物分蘖。
Drought stress inhibits tiller formation and growth, but the underlying mechanism is not well understood. Tiller development and lateral branch growth in monocot and dicot species respectively involve two stages: axillary bud initiation and subsequent outgrowth. The objective of this study was to investigate whether drought-inhibition of tiller growth is mainly due to the suppression of axillary bud initiation or subsequent outgrowth in perennial grass species and to determine whether drought-inhibition of tiller development and growth in grass species are associated with strigolactone (SL) accumulation and signaling. Seedlings with one fully-expanded leaf without axillary buds and those with three-fully expanded leaves and two axillary buds were grown in 20% polyethylene glycol (PEG) solution to induce drought stress. Plant height, number of leaves, axillary buds, tillers and length of axillary buds were monitored during 21 d of stress. Both axillary bud initiation and outgrowth were inhibited by drought stress, with outgrowth being more sensitive to drought stress. qRT-PCR analysis showed that expression level of genes involved in axillary bud activity was down-regulated at 14 d of drought stress while genes involved in axillary bud dormancy was up-regulated. Strigolactone (SL) content was elevated under drought stress in crowns. qRT-PCR analysis showed that expression level of genes involved in SL biosynthesis and signaling transduction were up-regulated during drought stress. Axillary bud outgrowth was sensitive to drought stress and could be associated with SL signaling, contributing to drought-inhibition of tillering in perennial grass species.
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DOI：
10.1111/j.1365-313x.2006.02916.x
发表时间：
2006-12
期刊：
The Plant journal : for cell and molecular biology
影响因子：
--
作者：
Junhuang Zou;Shuying Zhang;Weiping Zhang;Gang Li;Zongxiang Chen;W. Zhai;Xianfeng Zhao;Xuebiao Pan-Xuebia
通讯作者：
Junhuang Zou;Shuying Zhang;Weiping Zhang;Gang Li;Zongxiang Chen;W. Zhai;Xianfeng Zhao;Xuebiao Pan-Xuebia
影响因子：
4.9
作者：
Minakuchi K;Kameoka H;Yasuno N;Umehara M;Luo L;Kobayashi K;Hanada A;Ueno K;Asami T;Yamaguchi S;Kyozuka J
通讯作者：
Kyozuka J
影响因子：
5.6
作者：
Rameau C;Bertheloot J;Leduc N;Andrieu B;Foucher F;Sakr S
通讯作者：
Sakr S
影响因子：
7.4
作者：
BEVERIDGE, CA;ROSS, JJ;MURFET, IC
通讯作者：
MURFET, IC
影响因子：
7.4
作者：
Kebrom, Tesfamichael H.;Chandler, Peter M.;Spielmeyer, Wolfgang
通讯作者：
Spielmeyer, Wolfgang