Tomato LrgB regulates heat tolerance and the assimilation and partitioning of carbon
Copyright © 2018 Elsevier B.V. All rights reserved.
| Veröffentlicht in: | Plant science : an international journal of experimental plant biology. - 1985. - 274(2018) vom: 01. Sept., Seite 309-319 |
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| Weitere Verfasser: | , , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2018
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| Zugriff auf das übergeordnete Werk: | Plant science : an international journal of experimental plant biology |
| Schlagworte: | Journal Article Carbon assimilation partitioning Chlorophyll Heat tolerance Hsc70.1 SlLrgB Tomato HSP70 Heat-Shock Proteins Plant Proteins 1406-65-1 mehr... |
| Zusammenfassung: | Copyright © 2018 Elsevier B.V. All rights reserved. The impact of extreme and sustained high temperatures on plant growth has become increasingly prominent. Heat shock cognate 70-kDa proteins play an important role in plant heat tolerance. In this study, we identified and characterized the tomato ortholog of LrgB (SlLrgB), and demonstrate that it interacts with Hsc70.1. Similar to other genes that encode chloroplast-localized proteins, the expression of SlLrgB is upregulated in green tissues and suppressed by heat shock. Functional analyses utilizing transgenic plants indicate that SlLrgB contributes to chlorophyll metabolism. Both the overexpression and the RNA interference-mediated suppression of SlLrgB led to chlorotic leaves, reduced plant height, smaller size and decreases in pigment levels in ripening fruits. However, the starch levels in the SlLrgB-RNAi lines were significantly increased and the heat tolerance of SlLrgB-RNAi was obvious elevated. Downregulating the expression of Hsc70.1 by VIGS in tomato led to retarded growth, chlorotic leaves, and increased expression of SlLrgB. Based on these data, we suggest that SlLrgB regulates chlorophyll metabolism and the assimilation and partitioning of carbon. We also suggest that Hsc70.1 and SlLrgB contribute to heat tolerance and that Hsc70.1 negatively regulates SlLrgB |
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| Beschreibung: | Date Completed 09.10.2018 Date Revised 07.12.2022 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1873-2259 |
| DOI: | 10.1016/j.plantsci.2018.06.001 |