Coordination of seed dormancy and germination processes by MYB96

被引:14
作者
Lee, Kyounghee [1 ,2 ]
Seo, Pil Joon [1 ,2 ,3 ,4 ]
机构
[1] Chonbuk Natl Univ, Dept Bioact Mat Sci, Jeonju, South Korea
[2] Chonbuk Natl Univ, Res Ctr Bioact Mat, Jeonju, South Korea
[3] Chonbuk Natl Univ, Dept Chem, Jeonju, South Korea
[4] Chonbuk Natl Univ, Res Inst Phys & Chem, Jeonju, South Korea
基金
新加坡国家研究基金会;
关键词
abscisic acid; seed dormancy; seed germination; MYB96; ABI4; Arabidopsis; ARABIDOPSIS; MOBILIZATION; BIOSYNTHESIS; RGL2;
D O I
10.1080/15592324.2015.1056423
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The transition between seed dormancy and germination is an important stage that initiates plant life cycle. Hormonal balances of abscisic acid (ABA) and gibberellin (GA) contribute to determining the proper timing to germinate. Here, we demonstrate that the R2R3-type MYB96 transcription factor, a key ABA signaling mediator, coordinates seed dormancy and germination processes through distinct downstream events. This transcription factor controls ABA-INSENSITIVE 4 (ABI4) expression to inhibit seed germination by suppressing breakdown of lipid reserves in embryo. In addition, it also induces seed dormancy by stimulating ABA biosynthesis in an ABI4-independent manner. We propose that MYB96 integrates a multitude of environmental stress signals and acts as a master regulator in the determination of timing for seed germination.
引用
收藏
页数:3
相关论文
共 15 条
[1]   Molecular networks regulating Arabidopsis seed maturation, after-ripening, dormancy and germination [J].
Holdsworth, Michael J. ;
Bentsink, Leonie ;
Soppe, Wim J. J. .
NEW PHYTOLOGIST, 2008, 179 (01) :33-54
[2]   Seed Storage Oil Mobilization Is Important But Not Essential for Germination or Seedling Establishment in Arabidopsis [J].
Kelly, Amelie A. ;
Quettier, Anne-Laure ;
Shaw, Eve ;
Eastmond, Peter J. .
PLANT PHYSIOLOGY, 2011, 157 (02) :866-875
[3]   The protein phosphatase AtPP2CA negatively regulates abscisic acid signal transduction in Arabidopsis, and effects of abh1 on AtPP2CA mRNA [J].
Kuhn, JM ;
Boisson-Dernier, A ;
Dizon, MB ;
Maktabi, MH ;
Schroeder, JI .
PLANT PHYSIOLOGY, 2006, 140 (01) :127-139
[4]   The Arabidopsis MYB96 transcription factor plays a role in seed dormancy [J].
Lee, Hong Gil ;
Lee, Kyounghee ;
Seo, Pil Joon .
PLANT MOLECULAR BIOLOGY, 2015, 87 (4-5) :371-381
[5]  
Lee K, 2015, PLANT PHYSL, P00162
[6]   Gibberellin regulates Arabidopsis seed germination via RGL2, a GAI/RGA-like gene whose expression is up-regulated following imbibition [J].
Lee, SC ;
Cheng, H ;
King, KE ;
Wang, WF ;
He, YW ;
Hussain, A ;
Lo, J ;
Harberd, NP ;
Peng, JR .
GENES & DEVELOPMENT, 2002, 16 (05) :646-658
[7]   ABI5 acts downstream of ABI3 to execute an ABA-dependent growth arrest during germination [J].
Lopez-Molina, L ;
Mongrand, B ;
McLachlin, DT ;
Chait, BT ;
Chua, NH .
PLANT JOURNAL, 2002, 32 (03) :317-328
[8]   Arabidopsis ABA INSENSITIVE4 regulates lipid mobilization in the embryo and reveals repression of seed germination by the endosperm [J].
Penfield, Steven ;
Li, Yi ;
Gilday, Alison D. ;
Graham, Stuart ;
Graham, Ian A. .
PLANT CELL, 2006, 18 (08) :1887-1899
[9]   The Gibberellic Acid Signaling Repressor RGL2 Inhibits Arabidopsis Seed Germination by Stimulating Abscisic Acid Synthesis and ABI5 Activity [J].
Piskurewicz, Urszula ;
Jikumaru, Yusuke ;
Kinoshita, Natsuko ;
Nambara, Eiji ;
Kamiya, Yuji ;
Lopez-Molina, Luis .
PLANT CELL, 2008, 20 (10) :2729-2745
[10]   Germination and storage reserve mobilization are regulated independently in Arabidopsis [J].
Pritchard, SL ;
Charlton, WL ;
Baker, A ;
Graham, IA .
PLANT JOURNAL, 2002, 31 (05) :639-647