An improved agar-plate method for studying root growth and response of Arabidopsis thaliana.

An improved agar-plate method for studying root growth and response of Arabidopsis thaliana.
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研究拟南芥根系生长和反应的改进琼脂平板方法

DOI:
10.1038/srep01273
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发表时间:
2013
期刊:
影响因子:
4.6
通讯作者:
Zhang, Jianhua
Zhang, Jianhua
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Xu, Weifeng;Ding, Guochang;Yokawa, Ken;Baluska, Frantisek;Li, Qian-Feng;Liu, Yinggao;Shi, Weiming;Liang, Jiansheng;Zhang, Jianhua

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拟南芥是植物生物学研究中广泛使用的模式植物。在传统的琼脂平板培养系统(TPG,传统植物生长)下,植物芽和根均暴露在光照下,根在添加蔗糖的培养基中生长。这不是根的自然环境,可能会导致伪影反应。我们开发了一种改进的琼脂平板培养系统(IPG,改进的植物生长),其中芽被照亮,但根在黑暗中生长,不添加蔗糖。与TPG相比,IPG产生的植物的总根长度、侧根长度和根毛密度显着减少,尽管它们的初生根更长。 IPG 生长的根中的根向地性、PIN2(生长素外排载体)丰度、H⁺ 外流或 Ca2⁺ 内流在 IPG 生长的根中均弱于 TPG 生长的根。我们得出的结论是,IPG 提供了一种更自然的方法来研究拟南芥的根系生长和反应。
Arabidopsis thaliana is a widely used model plant for plant biology research. Under traditional agar-plate culture system (TPG, traditional plant-growing), both plant shoots and roots are exposed to illumination, and roots are grown in sucrose-added medium. This is not a natural environment for the roots and may cause artifact responses. We have developed an improved agar-plate culture system (IPG, improved plant-growing) where shoots are illuminated but roots are grown in darkness without sucrose addition. Compared to TPG, IPG produced plants with significantly less total root length, lateral root length and root hair density, although their primary roots were longer. Root gravitropism, PIN2 (an auxin efflux carrier) abundance, H⁺ efflux or Ca²⁺ influx in root apexes, were weaker in IPG-grown roots than those in TPG-grown roots. We conclude that IPG offers a more natural way to study the root growth and response of Arabidopsis thaliana.
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