petit1, a Conditional Growth Mutant of Arabidopsis Defective in Sucrose-Dependent Elongation Growth1
AUTOR(ES)
Kurata, Tetsuya
FONTE
American Society of Plant Physiologists
RESUMO
The hypocotyl of Arabidopsis is well suited for the analysis of cell elongation because it elongates without cell division. We have isolated a new class of recessive mutants, petit1 (pet1), which are defective in aspects of hypocotyl elongation. The short-hypocotyl phenotype of pet1 is caused by shortened cells. The cells of the elongation zone of the hypocotyl are often deformed. pet1 also shows defects in elongation of the roots, flower stalk, leaves, petals, pedicels, and siliques, and these defects cannot be repaired by the application of auxin, gibberellin, brassinolide, or an inhibitor of ethylene biosynthesis. The short-hypocotyl phenotype of pet1 is pronounced only in growth medium supplemented with sucrose, which has promotive effects on hypocotyl elongation. In pet1 this effect is much reduced, causing the sucrose-dependent short-hypocotyl phenotype of pet1. pet1 accumulates more soluble sugars than the wild type and also shows more intensive iodo-starch staining in the cotyledon and hypocotyl. These results indicate that PETIT1 is involved in a sugar-dependent elongation process that may include correct assembly of expanding cell wall architecture.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=34789Documentos Relacionados
- Sucrose-dependent spectinomycin-resistant mutants of Escherichia coli.
- Effect of an Orphan Response Regulator on Streptococcus mutans Sucrose-Dependent Adherence and Cariogenesis
- Molecular basis for the different sucrose-dependent adherence properties of Streptococcus mutans and Streptococcus sanguis.
- Inactivation of the Streptococcus mutans wall-associated protein A gene (wapA) results in a decrease in sucrose-dependent adherence and aggregation.
- Inactivation of the ciaH Gene in Streptococcus mutans Diminishes Mutacin Production and Competence Development, Alters Sucrose-Dependent Biofilm Formation, and Reduces Stress Tolerance