DELLA–PIF Modules: Old Dogs Learn New Tricks

Zheng, Yuyu; Gao, Zhengyuan; Zhu, Ziqiang

doi:10.1016/j.tplants.2016.08.006

Cited by 17 publications

(11 citation statements)

References 12 publications

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“…In the metabolic pathway of GA, decreased bioactive GA leads to accumulation of DELLA protein that inhibits expression of GA‐responsive genes through interaction with PIFs, such as PIF3 and PIF4, which are central regulatory components integrating multiple internal and external signals (Zheng et al ., 2016). RNA‐Seq analyses showed that three PIF genes ( TraesCS5D02G386500 , TraesCS5D02G428400 and TraesCS7A02G128300 ) were differentially expressed in stems at the jointing stage between TaGA2oxA9 ‐OE and TNL (Fig.…”

Section: Discussionmentioning

confidence: 99%

Rht24b, an ancient variation of TaGA2ox‐A9, reduces plant height without yield penalty in wheat

Tian

Xia

et al. 2021

New Phytologist

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Rht-B1b and Rht-D1b, the 'Green Revolution' (GR) genes, greatly improved yield potential of wheat under nitrogen fertilizer application, but reduced coleoptile length, seedling vigor and grain weight. Thus, mining alternative reduced plant height genes without adverse effects is urgently needed.We isolated the causal gene of Rht24 through map-based cloning and characterized its function using transgenic, physiobiochemical and transcriptome assays. We confirmed genetic effects of the dwarfing allele Rht24b with an association analysis and also traced its origin and distribution.Rht24 encodes a gibberellin (GA) 2-oxidase, TaGA2ox-A9. Rht24b conferred higher expression of TaGA2ox-A9 in stems, leading to a reduction of bioactive GA in stems but an elevation in leaves at the jointing stage. Strikingly, Rht24b reduced plant height, but had no yield penalty; it significantly increased nitrogen use efficiency, photosynthetic rate and the expression of related genes. Evolutionary analysis demonstrated that Rht24b first appeared in wild emmer and was detected in more than half of wild emmer and wheat accessions, suggesting that it underwent both natural and artificial selection.These findings uncover an important genetic resource for wheat breeding and also provide clues for dissecting the regulatory mechanisms underlying GA-mediated morphogenesis and yield formation.

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Section: Discussionmentioning

confidence: 99%

Rht24b, an ancient variation of TaGA2ox‐A9, reduces plant height without yield penalty in wheat

Tian

Xia

et al. 2021

New Phytologist

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“…The first spraying treatment with PP 333 significantly reduced the expression of DELLA (Figure 1B). This protein is also involved in the transmission of various plant hormones and environmental signals, such as abscisic acid (ABA) [44], jasmonic acid (JA) [45], sugar signal [46], and light signal [47,48]. The reduced DELLA expression level might be due to the fact that the tree just started to come into contact with PP 333 , resulting in an imbalance in other internal hormones, which in turn affects the expression level of DELLA protein.…”

Section: Discussionmentioning

confidence: 99%

Roles of the GA-mediated SPL Gene Family and miR156 in the Floral Development of Chinese Chestnut (Castanea mollissima)

Chen

Liu

et al. 2019

IJMS

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Chestnut (Castanea mollissima) is a deciduous tree species with major economic and ecological value that is widely used in the study of floral development in woody plants due its monoecious and out-of-proportion characteristics. Squamosa promoter-binding protein-like (SPL) is a plant-specific transcription factor that plays an important role in floral development. In this study, a total of 18 SPL genes were identified in the chestnut genome, of which 10 SPL genes have complementary regions of CmmiR156. An analysis of the phylogenetic tree of the squamosa promoter-binding protein (SBP) domains of the SPL genes of Arabidopsis thaliana, Populus trichocarpa, and C. mollissima divided these SPL genes into eight groups. The evolutionary relationship between poplar and chestnut in the same group was similar. A structural analysis of the protein-coding regions (CDSs) showed that the domains have the main function of SBP domains and that other domains also play an important role in determining gene function. The expression patterns of CmmiR156 and CmSPLs in different floral organs of chestnut were analyzed by real-time quantitative PCR. Some CmSPLs with similar structural patterns showed similar expression patterns, indicating that the gene structures determine the synergy of the gene functions. The application of gibberellin (GA) and its inhibitor (Paclobutrazol, PP333) to chestnut trees revealed that these exert a significant effect on the number and length of the male and female chestnut flowers. GA treatment significantly increased CmmiR156 expression and thus significantly decreased the expression of its target gene, CmSPL6/CmSPL9/CmSPL16, during floral bud development. This finding indicates that GA might indirectly affect the expression of some of the SPL target genes through miR156. In addition, RNA ligase-mediated rapid amplification of the 5′ cDNA ends (RLM-RACE) experiments revealed that CmmiR156 cleaves CmSPL9 and CmSPL16 at the 10th and 12th bases of the complementary region. These results laid an important foundation for further study of the biological function of CmSPLs in the floral development of C. mollissima.

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“…The transcription factor DELLA protein connects a collection of environmental signals [16,18,32,33]. The loss-of-function mutant della caused excessive plant growth in daylight [13][14][15]. Both DELLA and UV-B can activate the phenylpropane pathway and promote the accumulation of phenolic compounds, such as flavonoids, anthocyanins, and mustard oils, to adapt to environmental changes [2,8,[34][35][36][37].…”

Section: Discussionmentioning

confidence: 99%

“…The plant hormone GA is also involved in regulating seedling morphogenesis. Previous studies have shown that auxin, gibberellins (GAs), and brassinosteroid (BR) promote cell elongation, and in the case of GAs, hypocotyl growth [13][14][15][16]. In particular, in the GA pathway, when endogenous GA appears at a high level, it leads to degradation of DELLA, thereby releasing its inhibitory effect in GA signaling and promoting cell elongation.…”

Section: Introductionmentioning

confidence: 99%

BBX24 Interacts with DELLA to Regulate UV-B-Induced Photomorphogenesis in Arabidopsis thaliana

Huang

Xiong

Xie

et al. 2022

IJMS

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DELLA–PIF Modules: Old Dogs Learn New Tricks

Cited by 17 publications

References 12 publications

Rht24b, an ancient variation of TaGA2ox‐A9, reduces plant height without yield penalty in wheat

Rht24b, an ancient variation of TaGA2ox‐A9, reduces plant height without yield penalty in wheat

Roles of the GA-mediated SPL Gene Family and miR156 in the Floral Development of Chinese Chestnut (Castanea mollissima)

BBX24 Interacts with DELLA to Regulate UV-B-Induced Photomorphogenesis in Arabidopsis thaliana

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