Genome-Wide Identification and Expression Patterns of the <i>SWEET</i> Gene Family in <i>Bletilla striata</i> and its Responses to Low Temperature and Oxidative Stress

Genome-Wide Identification and Expression Patterns of the <i>SWEET</i> Gene Family in <i>Bletilla striata</i> and its Responses to Low Temperature and Oxidative Stress

SWEETs (sugars will eventually be exported transporters), a well-known class of sugar transporters, are involved in plant growth and development, sugar transport, biotic and abiotic stresses, etc. However, to date, there have been few investigations of <i>SWEETs</i> in Orchidaceae. In th...

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Bibliographic Details
Main Authors: Chan Lu, Jun Ye, Yuanqing Chang, Zeyuan Mi, Shuai Liu, Donghao Wang, Zhezhi Wang, Junfeng Niu
Format: Article
Language:English
Published: MDPI AG 2022-09-01
Series:International Journal of Molecular Sciences
Subjects:
<i>Bletilla striata</i>
expression pattern
subcellular localization
<i>SWEET</i>
Online Access:https://www.mdpi.com/1422-0067/23/17/10057
Description
Summary:SWEETs (sugars will eventually be exported transporters), a well-known class of sugar transporters, are involved in plant growth and development, sugar transport, biotic and abiotic stresses, etc. However, to date, there have been few investigations of <i>SWEETs</i> in Orchidaceae. In this study, 23 <i>SWEET</i> genes were identified in <i>Bletilla striata</i> for the first time, with an MtN3/saliva conserved domain, and were divided into four subgroups by phylogenetic tree. The same subfamily members had similar gene structures and motifs. Multiple <i>cis</i>-elements related to sugar and environmental stresses were found in the promoter region. Further, 21 genes were localized on 11 chromosomes and 2 paralogous pairs were found via intraspecific collinearity analysis. Expression profiling results showed that <i>BsSWEETs</i> were tissue-specific. It also revealed that <i>BsSWEET10</i> and <i>BsSWEET18</i> were responsive to low temperature and oxidative stresses. In addition, subcellular localization study indicated that <i>BsSWEET15</i> and <i>BsSWEET16</i> were localized in the cell membrane. This study provided important clues for the in-depth elucidation of the sugar transport mechanism of <i>BsSWEET</i> genes and their functional roles in response to abiotic stresses.
ISSN:1661-6596
1422-0067

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