|Table of Contents|

Responses of starch biosynthesis-related genes to nutrition starvation in Landoltia punctata(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

Issue:
2019 01
Page:
128-135
Research Field:
Articles
Publishing date:

Info

Title:
Responses of starch biosynthesis-related genes to nutrition starvation in Landoltia punctata
Author(s):
WANG Mingxiu1 2 LUAN Wei2 MA Xinrong2 TAO Xiang2** & ZHAO Yun1**
1 College of Life Sciences, Sichuan University, Chengdu 610041, China 2 Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
Keywords:
Landoltia punctata nutrient starvation starch biosynthesis gene transcriptome qRT-PCR
CLC:
Q949.717.03
PACS:
DOI:
10.19675/j.cnki.1006-687x.2018.04021
DocumentCode:

Abstract:
Landoltia punctata can accumulate high starch content, up to > 45% (dry weight) in 7 days, upon nutrient starvation. This study aimed to identify the genes related to starch metabolism and their expression patterns in response to starvation in L. punctata. The starvation-stress response transcriptome of L. punctata was carefully analyzed and used for the identification and quantification of starch metabolism-related genes. A quantitative real time-polymerase chain reaction (qRT-PCR) was performed to verify the quantification results. The results showed the presence of five LpAGP, two LpGBSS, two LpSSS, five LpSBE, seven LpISA, and one LpPUL genes. The RNA-Seq quantification results showed that LpAGPS1, LpAGPL2, LpAGPL3, LpGBSSI, LpGBSSII, LpSBEI-1, LpISA3, and LpPUL1 were all up-regulated by nutrient starvation. The qRT-PCR results of 16 starch metabolism key genes verified that most of them were up-regulated by starvation, while the expression of α-amylase and β-amylase were down-regulated. The opposite expression change patterns of starch biosynthesis- and degradation-related key genes resulted in the accumulation of starch. This study paves the way for further studies on elucidating the function and mechanism starch metabolism-related genes in L. punctata.

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Last Update: 2019-02-25