已入深夜,您辛苦了!由于当前在线用户较少,发布求助请尽量完整地填写文献信息,科研通机器人24小时在线,伴您度过漫漫科研夜!祝你早点完成任务,早点休息,好梦!

CYP707A1 and CYP707A2, Which Encode Abscisic Acid 8′-Hydroxylases, Are Indispensable for Proper Control of Seed Dormancy and Germination in Arabidopsis

脱落酸 拟南芥 胚乳 生物 发芽 突变体 分解代谢 拟南芥 休眠 种子休眠 胚胎 基因 细胞生物学 生物化学 植物
作者
Masanori Okamoto,Ayuko Kuwahara,Mitsunori Seo,Tetsuo Kushiro,Tadao Asami,Nobuhiro Hirai,Yuji Kamiya,Tomokazu Koshiba,Eiji Nambara
出处
期刊:Plant Physiology [Oxford University Press]
卷期号:141 (1): 97-107 被引量:573
标识
DOI:10.1104/pp.106.079475
摘要

Abstract Endogenous abscisic acid (ABA) levels are regulated by both biosynthesis and catabolism of the hormone. ABA 8′-hydroxylase is considered to be the key catabolic enzyme in many physiological processes. We have previously identified that four members of the Arabidopsis (Arabidopsis thaliana) CYP707A gene family (CYP707A1 to CYP707A4) encode ABA 8′-hydroxylases, and that the cyp707a2 mutants showed an increase in ABA levels in dry and imbibed seeds. In this study, we showed that the cyp707a1 mutant accumulated ABA to higher levels in dry seeds than the cyp707a2 mutant. Expression analysis showed that the CYP707A1 was expressed predominantly during mid-maturation and was down-regulated during late-maturation. Concomitantly, the CYP707A2 transcript levels increased from late-maturation to mature dry seed. Phenotypic analysis of single and double cyp707a mutants indicates that the CYP707A1 is important for reducing ABA levels during mid-maturation. On the other hand, CYP707A2 is responsible for the regulation of ABA levels from late-maturation to germination. Moreover, CYP707A1 and CYP707A3 were also shown to be involved in postgermination growth. Spatial expression analysis suggests that CYP707A1 was expressed predominantly in embryo during mid-maturation, whereas CYP707A2 expression was detected in both embryo and endosperm from late-maturation to germination. Our results demonstrate that each CYP707A gene plays a distinct role during seed development and postgermination growth.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
饭呆夫发布了新的文献求助10
1秒前
3秒前
4秒前
江峰发布了新的文献求助10
10秒前
起风了完成签到 ,获得积分10
12秒前
端庄洪纲完成签到 ,获得积分10
13秒前
方的圆完成签到 ,获得积分10
15秒前
Weiyu完成签到 ,获得积分10
15秒前
doudou完成签到 ,获得积分10
17秒前
思源应助江峰采纳,获得10
18秒前
winnie发布了新的文献求助10
29秒前
yysh1950完成签到,获得积分10
29秒前
bless完成签到 ,获得积分10
34秒前
科研通AI5应助惘闻采纳,获得10
35秒前
王二完成签到,获得积分10
38秒前
44秒前
44秒前
46秒前
46秒前
46秒前
46秒前
46秒前
46秒前
46秒前
江峰发布了新的文献求助10
48秒前
惘闻发布了新的文献求助10
49秒前
winnie完成签到,获得积分20
51秒前
52秒前
52秒前
52秒前
52秒前
52秒前
52秒前
52秒前
52秒前
52秒前
52秒前
52秒前
54秒前
CipherSage应助江峰采纳,获得10
55秒前
高分求助中
(应助此贴封号)【重要!!请各位详细阅读】【科研通的精品贴汇总】 10000
Revision of the Australian Thynnidae and Tiphiidae (Hymenoptera) 500
Instant Bonding Epoxy Technology 500
Pipeline Integrity Management Under Geohazard Conditions (PIMG) 500
Methodology for the Human Sciences 500
DEALKOXYLATION OF β-CYANOPROPIONALDEYHDE DIMETHYL ACETAL 400
Assessment of adverse effects of Alzheimer's disease medications: Analysis of notifications to Regional Pharmacovigilance Centers in Northwest France 400
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 4357736
求助须知:如何正确求助?哪些是违规求助? 3860390
关于积分的说明 12043214
捐赠科研通 3501998
什么是DOI,文献DOI怎么找? 1921974
邀请新用户注册赠送积分活动 964317
科研通“疑难数据库(出版商)”最低求助积分说明 863810