文章基本信息

标题：Lateral root elongation inside the basal cortex of the seminal root is caused by the changes in auxin distribution to the root system of rice (Oryza sativa L.) seedlings
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作者：Atsushi Ogawa ; Maya Matsunami ; Yusuke Suzuki 等
期刊名称：Plant Root
电子版ISSN：1881-6754
出版年度：2017
卷号：11
页码：10-15
DOI：10.3117/plantroot.11.10
出版社：Japan Science and Technology Information Aggregator, Electronic
摘要：Polar auxin transport was inhibited in rice seedlings when they were treated with N-1-naphthylphthalamic acid (NPA). The treatment reduced total root length and the number of lateral roots, and negatively affected gravitropism. The auxin content at the base of the seminal root significantly increased in the NPA treatment seedlings compared to the control. Lateral roots elongated along the seminal root axis after NPA treatment, but growth remained within the cortex. Lignin content in the basal region also increased at the same time and accumulated in the epidermis. These results suggest that NPA treatment prevents lateral roots from penetrating the hypodermis due to the hardening of hypodermis cell walls through the enhanced lignification, and the disturbed gravitropism caused by NPA treatment affected auxin flow.
关键词：Auxin;Lateral root;Lignification;N-1-naphthylphthalamic acid;Oryza sativa L.;Seminal root