TubZIP28 , a novel bZIP family transcription factor from Triticum urartu , and TabZIP28 , its homologue from Triticum aestivum , enhance starch synthesis in wheat

2020 ◽  
Vol 226 (5) ◽  
pp. 1384-1398 ◽  
Author(s):  
Yanhong Song ◽  
Guangbin Luo ◽  
Lisha Shen ◽  
Kang Yu ◽  
Wenlong Yang ◽  
...  
Genome ◽  
2013 ◽  
Vol 56 (2) ◽  
pp. 115-122 ◽  
Author(s):  
Guo-Zhang Kang ◽  
Wei Xu ◽  
Guo-Qin Liu ◽  
Xiao-Qi Peng ◽  
Tian-Cai Guo

The cDNA sequences of 26 starch synthesis genes were identified in common wheat (Triticum aestivum L.), and their transcript levels were measured using quantitative real-time RT–PCR to assess the function of individual genes and the regulatory mechanism in wheat endosperm. The expression patterns of 26 genes in wheat endosperm were classified into three groups. The genes in group 1 were richly expressed in the early stage of grain development and may be involved in the construction of fundamental cell machinery, synthesis of glucan primers, and initiation of starch granules. The genes in group 2 were highly expressed during the middle and late stages of grain development, and their expression profiles were similar to the accumulation rate of endosperm starch; these genes are presumed to play a crucial role in starch production. The genes in group 3 were scantily expressed throughout the grain development period and might be associated with transitory starch synthesis. Transcripts of the negative transcription factor TaRSR1 were high at the early and late stages of grain development but low during the middle stage. The expression pattern of TaRSR1 was almost opposite to those of the group 2 starch synthesis genes, indicating that TaRSR1 might negatively regulate the expression of many endosperm starch synthesis genes during grain development.


2017 ◽  
Vol 10 (8) ◽  
Author(s):  
Murtaza Malik ◽  
Saurabh Pandey ◽  
Kaushlendra Tripathi ◽  
Rashmi Jain ◽  
Tanushri Kaul

2019 ◽  
Vol 97 (5) ◽  
pp. 858-871 ◽  
Author(s):  
Julie Boudet ◽  
Marielle Merlino ◽  
Anne Plessis ◽  
Jean-Charles Gaudin ◽  
Mireille Dardevet ◽  
...  

2008 ◽  
Vol 117 (3) ◽  
pp. 321-331 ◽  
Author(s):  
Grit Haseneyer ◽  
Catherine Ravel ◽  
Mireille Dardevet ◽  
François Balfourier ◽  
Pierre Sourdille ◽  
...  

2019 ◽  
Vol 10 ◽  
Author(s):  
Jiandong Wu ◽  
Long Chen ◽  
Mingchao Chen ◽  
Wei Zhou ◽  
Qing Dong ◽  
...  

2019 ◽  
Vol 20 (3) ◽  
pp. 483 ◽  
Author(s):  
Kangyong Zha ◽  
Haoxun Xie ◽  
Min Ge ◽  
Zimeng Wang ◽  
Yu Wang ◽  
...  

As major component in cereals grains, starch has been one of the most important carbohydrate consumed by a majority of world’s population. However, the molecular mechanism for regulation of biosynthesis of starch remains elusive. In the present study, ZmES22, encoding a MADS-type transcription factor, was modestly characterized from maize inbred line B73. ZmES22 exhibited high expression level in endosperm at 10 days after pollination (DAP) and peaked in endosperm at 20 DAP, indicating that ZmES22 was preferentially expressed in maize endosperm during active starch synthesis. Transient expression of ZmES22 in tobacco leaf revealed that ZmES22 protein located in nucleus. No transactivation activity could be detected for ZmES22 protein via yeast one-hybrid assay. Transformation of overexpressing plasmid 35S::ZmES22 into rice remarkedly reduced 1000-grain weight as well as the total starch content, while the soluble sugar was significantly higher in transgenic rice lines. Moreover, overexpressing ZmES22 reduced fractions of long branched starch. Scanning electron microscopy images of transverse sections of rice grains revealed that altered expression of ZmES22 also changed the morphology of starch granule from densely packed, polyhedral starch granules into loosely packed, spherical granules with larger spaces. Furthermore, RNA-seq results indicated that overexpressing ZmES22 could significantly influence mRNA expression levels of numerous key regulatory genes in starch synthesis pathway. Y1H assay illustrated that ZmES22 protein could bind to the promoter region of OsGIF1 and downregulate its mRNA expression during rice grain filling stages. These findings suggest that ZmES22 was a novel regulator during starch synthesis process in rice endosperm.


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