Brassinosteroids-mediated regulation of ABI3 is involved in high-temperature induced early flowering in plants

• 발행기관: (사)한국식물생명공학회
• 저자명: Jeongeui Hong Jwakyung Sung Hojin Ryu
• 간행물 정보: 『Journal of Plant Biotechnology』45권 2호, 83~89쪽, 전체 7쪽
• 주제분류: 농수해양 > 기타농수해양
• 파일형태: PDF
• 발행일자: 2018.06.30

영문 초록

The interplay of plant hormones is one of the essential mechanisms for plant growth and development. A recent study reported that Brassinosteroids (BR) and ABSCISIC ACID (ABA) interact antagonistically in early seedling developments through the BR-mediated epigenetic repression of ABSCISIC ACID-INSENSITIVE 3 (ABI3). However, the other physiological roles of the BR-mediated regulation of ABI3 and ABA responses beyond early seedling developments remain largely unknown. Here, we showed that the activation of BR signaling by high temperatures promotes flowering time through the suppression of ABI3 expressions. Elevated ambient temperature induced early flowering in wild type Col-0 plants, but not in BR-defective bri1-116 mutant plants. Conversely, a hyper BR biosynthetic dwf4-D mutant displayed more sensitive thermomorphic long shoot elongation and early flowering. Both expression patterns and physiological responses supported the biological roles of ABI3 in the regulation of floral transition and reproduction under high temperature conditions. Finally, we confirmed that the lowered expressions of the transcript and protein levels of ABI3 brought on by elevated temperature were correlated with warmth-induced early flowering phenotypes. In conclusion, our data suggest that the BR- and warmthmediated regulation of ABI3 are important in thermomorphic reproductive phase transitions in plants.

목차

Introduction

Materials and Methods

Results and Discussion

Acknowledgments

Reference

키워드

High temperature Brassinosteroids ABI3 Plant hormone Flowering