Ivr2, a candidate gene for a QTL of vacuolar invertase activity in maize leaves. Gene-specific expression under water stress |
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| Authors: | Pelleschi Sandrine Guy Sylvain Kim Jae-Yean Pointe Céline Mahé Aline Barthes Laure Leonardi Agnès Prioul Jean-Louis |
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| Institution: | (1) Structure et Métabolisme des Plantes, Institut de Biotechnologie des Plantes (ERS 569, associée au CNRS), Université de Paris-Sud, 91405 Orsay Cedex, France;(2) Génétique des Systèmes Végétaux (INRA, URA 2154 CNRS, UPS, INAPG), La Ferme du Moulon, Université de Paris-Sud, 91190 Gif-sur-Yvette, France |
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| Abstract: | Water shortage produced an early and large stimulation of acid- soluble invertase activity in adult maize leaves whereas cell wall invertase activity remained constant. This response was closely related to the mRNA level for only one of the invertase gene (Ivr2), encoding a vacuolar isoform. In parallel, four quantitative trait loci (QTLs) were detected for invertase activity under control and nine under stressful conditions. One QTL in control and one in stressed plants was located near to the lvr2 gene on chromosome 5. Other QTLs for invertase activity were found close to carbohydrate QTLs; some of them formed stress  clusters . |
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| Keywords: | maize (Zea mays L ) water stress invertase activity QTL mapping invertase mRNA |
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