Search

Your search keyword '"Yang Chengcong"' showing total 8 results
Start Over Author "Yang Chengcong" Publisher elsevier bv
8 results on '"Yang Chengcong"'

4. SRG1, Encoding a Kinesin-4 Protein, Is an Important Factor for Determining Grain Shape in Rice

Author

Jin Xiaoli, Yang Chengcong, Delara Akhter, Qin Ran, Jamal Eshag, Shi Chunhai, and Ujjal Kumar Nath

Subjects
0301 basic medicine, Cell growth, Mutant, Morphogenesis, Wild type, food and beverages, Methane sulfonate, Plant Science, lcsh:Plant culture, Biology, Cell biology, 03 medical and health sciences, Exon, 030104 developmental biology, Gene mapping, lcsh:SB1-1110, Agronomy and Crop Science, Gene, Biotechnology
Abstract

Grain shape is one of the important agronomic traits, which is closely related to the yield of rice. A new rice mutant, named small and round grain (srg1), was isolated from an indica cultivar Zhenong 34 by ethyl methane sulfonate (EMS) mutagenesis. The microscopic analysis showed that the cell length of spikelet in srg1 was decreased compared with that in wild type (WT), which caused the grain length short. Meanwhile, the grains of srg1 were wider than those of WT because of the increased cell layers in spikelet in the lateral direction. Therefore, the inhibition of cell expansion and increased cell proliferation collectively led to the small and round grain. By map-based cloning, the gene SRG1 was located on the short arm of chromosome 9, which encodes a kinesin-4 protein, represented by the gene LOC_Os09g02650. A single nucleotide polymorphism, occurred in the 16th exon of SRG1, led to premature translation stop in mutant. The cell cycle-related genes were up-regulated in srg1, which conferred that SRG1 controlled grain width through the cell proliferation. Since the role of SRG1 in regulating grain shape was not clarified well before, it is valuable to explore the mechanism of grain development. This study could, hence, provide a morphogenesis and molecular basis for elucidating the function of SRG1, as well as a new germplasm resource for the further study of grain development. Keywords: small and round grain, kinesin-4 protein, gene mapping, rice

Published
2018
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results