Intra-Specific Variation in Desiccation Tolerance of Citrus sinensis ‘bingtangcheng’ (L.) Seeds under Different Environmental Conditions in China.
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ijms-24-07393.pdf
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Resource type
Journal article
Date published
April 17, 2023
Abstract
Intra-specific variation in seed storage behaviour observed in several species has been related to different maternal environments. However, the particular environmental conditions and molecular processes involved in intra-specific variation of desiccation tolerance remain unclear. We chose Citrus sinensis ‘bingtangcheng’ for the present study due to its known variability in desiccation tolerance amongst seed lots. Six seed lots of mature fruits were harvested across China and systematically compared for drying sensitivity. Annual sunshine hours and average temperature from December to May showed positive correlations with the level of seed survival of dehydration. Transcriptional analysis indicated significant variation in gene expression between relatively desiccation-tolerant (DT) and -sensitive (DS) seed lots after harvest. The major genes involved in late seed maturation, such as heat shock proteins, showed higher expression in the DT seed lot. Following the imposition of drying, 80% of stress-responsive genes in the DS seed lot changed to the stable levels seen in the DT seed lot prior to and post-desiccation. However, the changes in expression of stress-responsive genes in DS seeds did not improve their tolerance to desiccation. Thus, higher desiccation tolerance of Citrus sinensis ‘bingtangcheng’ seeds is modulated by the maternal environment (e.g., higher annual sunshine hours and seasonal temperature) during seed development and involves stable expression levels of stress-responsive genes.
Funder
| Funder name | Awards |
National Natural Science Foundation of China, China | NSFC 31770375 |
Science and Technology Basic Resources Investigation Program, China | 2021FY100200 |
Royal Botanic Gardens, Kew, United Kingdom | |
Department for Environment, Food and Rural Affairs, UK Government, United Kingdom | |
Kunming Institute of Botany, Chinese Academy of Sciences, China | |
Journal title
International Journal of Molecular Sciences
Volume
24
Issue
8
Article number
7393
Publisher
MDPI AG
Place of publication
Basel, Switzerland
eISSN
1422-0067
Date accepted
April 7, 2023
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Additional information
IF = 6.208 (2022-2023)