Ethylene-induced Arabidopsis hypocotyl elongation is dependent on but not mediated by gibberellins
نویسندگان
چکیده
منابع مشابه
Auxin transport is required for hypocotyl elongation in light-grown but not dark-grown Arabidopsis.
Many auxin responses are dependent on redistribution and/or polar transport of indoleacetic acid. Polar transport of auxin can be inhibited through the application of phytotropins such as 1-naphthylphthalamic acid (NPA). When Arabidopsis thaliana seedlings were grown in the light on medium containing 1.0 microM NPA, hypocotyl and root elongation and gravitropism were strongly inhibited. When gr...
متن کاملAluminium-induced inhibition of root elongation in Arabidopsis is mediated by ethylene and auxin
Aluminium (Al) is phytotoxic when solubilized into Al(3+) in acidic soils. One of the earliest and distinct symptoms of Al(3+) toxicity is inhibition of root elongation. To decipher the mechanism by which Al(3+) inhibits root elongation, the role of ethylene and auxin in Al(3+)-induced inhibition of root elongation in Arabidopsis thaliana was investigated using the wild type and mutants defecti...
متن کاملHOOKLESS1, an Ethylene Response Gene, Is Required for Differential Cell Elongation in the Arabidopsis Hypocotyl
Bending in plant tissues results from differential cell elongation. We have characterized Arabidopsis "hookless" mutants that are defective in differential growth in the hypocotyl. HOOKLESS1 was cloned and its predicted protein shows similarity to a diverse group of N-acetyltransferases. HOOKLESS1 mRNA is increased by treatment with ethylene and decreased in the ethylene-insensitive mutant ein2...
متن کاملHigh temperature promotes auxin-mediated hypocotyl elongation in Arabidopsis.
Physiological studies with excised stem segments have implicated the plant hormone indole-3-acetic acid (IAA or auxin) in the regulation of cell elongation. Supporting evidence from intact plants has been somewhat more difficult to obtain, however. Here, we report the identification and characterization of an auxin-mediated cell elongation growth response in Arabidopsis thaliana. When grown in ...
متن کاملArabidopsis Mutants Lacking Blue Light-Dependent Inhibition of Hypocotyl Elongation.
We have isolated a new class of photomorphogenic mutants in Arabidopsis. Hypocotyl elongation is not inhibited in the mutant seedlings by continuous blue light but is inhibited by far red light, indicating that these mutations are phenotypically different from the previously isolated long hypocotyl (hy) mutants. Complementation analysis indicated that recessive nuclear mutations at three geneti...
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ژورنال
عنوان ژورنال: Journal of Experimental Botany
سال: 2007
ISSN: 0022-0957,1460-2431
DOI: 10.1093/jxb/erm288