2015
DOI: 10.1111/tpj.12820
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Brassinosteroids promote development of rice pollen grains and seeds by triggering expression of Carbon Starved Anther, a MYB domain protein

Abstract: SUMMARYTransport of photoassimilates from leaf tissues (source regions) to the sink organs is essential for plant development. Here, we show that a phytohormone, the brassinosteroids (BRs) promotes pollen and seed development in rice by directly promoting expression of Carbon Starved Anther (CSA) which encodes a MYB domain protein. Over-expression of the BR-synthesis gene D11 or a BR-signaling factor OsBZR1 results in higher sugar accumulation in developing anthers and seeds, as well as higher grain yield comp… Show more

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Cited by 150 publications
(99 citation statements)
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References 63 publications
(107 reference statements)
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“…We then asked whether SMG11 influences expression of BR-signaling genes involved in the regulation grain size, such as OsBRI1 , GSK2 , OsBZR1 , and BU1 (Yamamuro et al, 2000; Tanaka et al, 2009; Tong et al, 2012; Zhu et al, 2015). We performed quantitative real-time RT-PCR analysis to investigate their expression levels in KYJ and smg11 panicles.…”
Section: Resultsmentioning
confidence: 99%
“…We then asked whether SMG11 influences expression of BR-signaling genes involved in the regulation grain size, such as OsBRI1 , GSK2 , OsBZR1 , and BU1 (Yamamuro et al, 2000; Tanaka et al, 2009; Tong et al, 2012; Zhu et al, 2015). We performed quantitative real-time RT-PCR analysis to investigate their expression levels in KYJ and smg11 panicles.…”
Section: Resultsmentioning
confidence: 99%
“…cell elongation, cell division, flowering time control, and responses to biotic and abiotic stresses (Wang, 2008). Recently, BRs were found to regulate male fertility through modulating the expression of key genes involved in Arabidopsis anther and pollen development (Ye et al , 2010 b ) and BRs facilitate pollen development by directly promoting the expression of a rice MYB domain protein, CSA (Zhu et al , 2015). As mentioned in the section on Mapman analysis, BR signaling components were significantly over-represented in the phosphoproteomic dataset of anther phases I, and we thus identified proteins relevant to BR signaling in our results (Supplementary Table S8).…”
Section: Resultsmentioning
confidence: 99%
“…Although many imprinted genes have been identified in plants (Bauer & Fischer, ), few have been functionally investigated (Jiang & Kohler, ). A significant finding of our study is that 58 MEGs and 45 PEGs are associated with genomic regions of grain yield‐related traits, including 1000‐seed weight QTLs (Yu et al ., ; Luo et al ., ; Hua et al ., , ; Xing et al ., ; Hittalmani et al ., ; Septiningsih et al ., ; Thomson et al ., ) (http://www.ricedata.cn/maps.aspx), many of which have been shown to mediate seed morphology and development through biological pathways of energy and metabolism (Asano et al ., ; Li et al ., ; Zhang X et al ., ; Zhu et al ., ). The imprinted genes encoding transcription factors could mediate cell proliferation and endosperm cellularization, and hence affect the seed size (Bauer & Fischer, ).…”
Section: Discussionmentioning
confidence: 97%
“…Os12g42310 (OsPPKL1) is cloned from one of the kernel weight QTLs , which encodes a protein phosphatase with a Kelch-like repeat domain (OsPPKL), and affects grain length and weight. Os01g16810, encoding a MYB domain protein, directly regulates the expression of sugar partitioning and metabolic genes during pollen and seed development (Zhu et al, 2015). Os10g42690 (JMJ706), encoding a protein with a jmjC domain, regulates the demethylation of H3K9me2 and H3K9me3; abnormal flowers and seeds develop in the mutant .…”
Section: New Phytologistmentioning
confidence: 99%