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| Open AccessGAS2 encodes a 2-oxoglutarate dependent dioxygenase involved in ABA catabolism
- Theo Lange
- , Nadiem Atiq
- & Maria João Pimenta Lange
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Article
| Open AccessUV-B irradiation-activated E3 ligase GmILPA1 modulates gibberellin catabolism to increase plant height in soybean
Gibberellins (GA) negatively regulate UVB-mediated suppression of plant height in plants. Here, the authors show that GmILPA1-mediated degradation of GmGA2ox-like protein counteract the UV-B-mediated reduction of bioactive GAs contributing to the linkage between the affection of UV-B and GA on plant height of soybean.
- Jiaqi Sun
- , Shiyu Huang
- & Fengning Xiang
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Article
| Open AccessIndependently evolved viral effectors convergently suppress DELLA protein SLR1-mediated broad-spectrum antiviral immunity in rice
Plant viruses adopt diverse strategies to inhibit host antiviral defense. Here the authors show that multiple different effectors from various rice viruses interfere with host gibberellin signaling by targeting the DELLA protein SLR1.
- Lulu Li
- , Hehong Zhang
- & Zongtao Sun
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Article
| Open AccessThe grain yield modulator miR156 regulates seed dormancy through the gibberellin pathway in rice
Pre-harvest sprouting reduces the yield of agriculturally important crops such as rice. Here, the authors show that mutating specific members of the MIR156 gene family can suppress pre-harvest sprouting in rice without negative effects on plant architecture, suggesting a practical route to elite crop varieties.
- Chunbo Miao
- , Zhen Wang
- & Jian-Kang Zhu
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Article
| Open AccessSLR1 inhibits MOC1 degradation to coordinate tiller number and plant height in rice
Due to reduced gibberellin sensitivity, modern rice cultivars are shorter than traditional varieties but produce more tillers and have higher yields. Here Liao et al. show that gibberellin contributes to decreased tiller number by degrading the MOC1 protein that suppresses bud outgrowth.
- Zhigang Liao
- , Hong Yu
- & Jiayang Li
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Article
| Open AccessBiosynthesis of DHGA12 and its roles in Arabidopsis seedling establishment
Gibberellins are a major class of phytohormones that regulate plant growth and development. Here the authors show that the Arabidopsis GAS2 protein catalyses production of DHGA12, an atypical bioactive GA, and show that GAS2 regulates ABA sensitivity during seed germination and early development.
- Hao Liu
- , Siyi Guo
- & Chun-Peng Song
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Article
| Open AccessTyrosine phosphorylation of the GARU E3 ubiquitin ligase promotes gibberellin signalling by preventing GID1 degradation
Plants respond to gibberellins via GID1-dependent degradation of DELLA proteins. Here, Nemoto et al. show that the gibberellin response is positively regulated by tyrosine phosphorylation of GARU, an E3 ubiquitin ligase that mediates degradation of GID1.
- Keiichirou Nemoto
- , Abdelaziz Ramadan
- & Tatsuya Sawasaki
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Article
| Open AccessAtSWEET13 and AtSWEET14 regulate gibberellin-mediated physiological processes
SWEET proteins are known to function as sugar transporters. Here, Kannoet al. show that Arabidopsis SWEET13 and SWEET14 are also able to transport the plant hormone gibberellin (GA) in heterologous systems and that sweetmutants display phenotypes consistent with altered GA response.
- Yuri Kanno
- , Takaya Oikawa
- & Mitsunori Seo
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Article
| Open AccessThe NF-YC–RGL2 module integrates GA and ABA signalling to regulate seed germination in Arabidopsis
Crosstalk between gibberellic acid (GA) and abscisic acid (ABA) regulates seed germination. Here the authors show that NF-YC transcription factors can interact with the RGL2 DELLA protein to regulate expression of ABI5and therefore modulate ABA- and GA-responsive gene expression.
- Xu Liu
- , Pengwei Hu
- & Xingliang Hou
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Article
| Open AccessDELLA proteins are common components of symbiotic rhizobial and mycorrhizal signalling pathways
Symbiotic associations between legumes and nitrogen-fixing bacteria are regulated by a CCaMK-IPD3 protein complex which promotes nodule initiation. Here, Jin et al. propose that DELLA proteins positively regulate nodulation by enhancing phosphorylation of IPD3 and acting as a positive regulator of transcription.
- Yue Jin
- , Huan Liu
- & Ertao Wang
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Article
| Open AccessControl of cotton fibre elongation by a homeodomain transcription factor GhHOX3
Cotton fibre is the most important renewable material for textiles, with a huge economic output. Here the authors show that a homeodomain-leucine zipper transcription factor, GhHOX3, transduces a gibberellin signal that in turn promotes fibre cell elongation.
- Chun-Min Shan
- , Xiao-Xia Shangguan
- & Xiao-Ya Chen
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Article
| Open AccessThe Gibberellin perception system evolved to regulate a pre-existing GAMYB-mediated system during land plant evolution
Plant male reproduction is controlled by gibberellin signalling via the transcription factor GAMYB. Here, deletion of GAMYB in a moss species lacking a gibberellin signalling pathway gives rise to abnormal spores, suggesting that primitive plants used GAMYB for the control of sexual organ development.
- Koichiro Aya
- , Yuji Hiwatashi
- & Makoto Matsuoka