ß-amylase1 mutant Arabidopsis plants show improved drought tolerance due to reduced starch breakdown in guard cells

© The Author 2015. Published by Oxford University Press on behalf of the Society for Experimental Biology.

Bibliographische Detailangaben
Veröffentlicht in:Journal of experimental botany. - 1985. - 66(2015), 19 vom: 02. Sept., Seite 6059-67
1. Verfasser: Prasch, Christian Maximilian (VerfasserIn)
Weitere Verfasser: Ott, Kirsten Verena, Bauer, Hubert, Ache, Peter, Hedrich, Rainer, Sonnewald, Uwe
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2015
Zugriff auf das übergeordnete Werk:Journal of experimental botany
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Arabidopsis drought guard cells starch. β-amylases Arabidopsis Proteins Water 059QF0KO0R mehr... Starch 9005-25-8 BAM1 protein, Arabidopsis EC 2.7.11.1 Protein Serine-Threonine Kinases
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520 |a © The Author 2015. Published by Oxford University Press on behalf of the Society for Experimental Biology. 
520 |a In plants, drought stress is a major growth limiting factor causing cell water loss through open stomata. In this study, guard cell-specific transcripts from drought-stressed Arabidopsis plants were analysed and a down-regulation of β-amylase 1 (BAM1) was found. In previous studies, BAM1 was shown to be involved in stomatal starch degradation under ambient conditions. Impaired starch breakdown of bam1 mutant plants was accompanied by decreased stomatal opening. Here, it is shown that drought tolerance of bam1 mutant plants is improved as compared with wild-type controls. Microarray analysis of stomata-specific transcripts from bam1 mutant plants revealed a significant down-regulation of genes encoding aquaporins, auxin- and ethylene-responsive factors, and cell-wall modifying enzymes. This expression pattern suggests that reduced water uptake and limited cell wall extension are associated with the closed state of stomata of bam1 mutant plants. Together these data suggest that regulation of stomata-specific starch turnover is important for adapting stomata opening to environmental needs and its breeding manipulation may result in drought tolerant crop plants 
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650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a Arabidopsis 
650 4 |a drought 
650 4 |a guard cells 
650 4 |a starch. 
650 4 |a β-amylases 
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650 7 |a BAM1 protein, Arabidopsis  |2 NLM 
650 7 |a EC 2.7.11.1  |2 NLM 
650 7 |a Protein Serine-Threonine Kinases  |2 NLM 
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700 1 |a Ott, Kirsten Verena  |e verfasserin  |4 aut 
700 1 |a Bauer, Hubert  |e verfasserin  |4 aut 
700 1 |a Ache, Peter  |e verfasserin  |4 aut 
700 1 |a Hedrich, Rainer  |e verfasserin  |4 aut 
700 1 |a Sonnewald, Uwe  |e verfasserin  |4 aut 
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