A HY5‐COL3‐COL13 regulatory chain for controlling hypocotyl elongation in Arabidopsis
نویسندگان
چکیده
منابع مشابه
MDP25, a novel calcium regulatory protein, mediates hypocotyl cell elongation by destabilizing cortical microtubules in Arabidopsis.
The regulation of hypocotyl elongation is important for plant growth. Microtubules play a crucial role during hypocotyl cell elongation. However, the molecular mechanism underlying this process is not well understood. In this study, we describe a novel Arabidopsis thaliana microtubule-destabilizing protein 25 (MDP25) as a negative regulator of hypocotyl cell elongation. We found that MDP25 dire...
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To develop a model plant system for efficient functional analysis of mutagenized phytochrome polypeptides, we have overexpressed oat phytochrome A in Arabidopsis thaliana. R1 seedlings from selfed primary transformants segregated for hypocotyl length, when grown in the light, with a ratio of 3 short to 1 of normal length. When homozygous lines were established from these two size classes, accum...
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Light significantly inhibits hypocotyl cell elongation, and dark-grown seedlings exhibit elongated, etiolated hypocotyls. Microtubule regulatory proteins function as positive or negative regulators that mediate hypocotyl cell elongation by altering microtubule organization. However, it remains unclear how plants coordinate these regulators to promote hypocotyl growth in darkness and inhibit gro...
متن کاملHormonal interactions in the control of Arabidopsis hypocotyl elongation.
The Arabidopsis hypocotyl, together with hormone mutants and chemical inhibitors, was used to study the role of auxin in cell elongation and its possible interactions with ethylene and gibberellin. When wild-type Arabidopsis seedlings were grown on media containing a range of auxin concentrations, hypocotyl growth was inhibited. However, when axr1-12 and 35S-iaaL (which have reduced auxin respo...
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 ...
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ژورنال
عنوان ژورنال: Plant, Cell & Environment
سال: 2020
ISSN: 0140-7791,1365-3040
DOI: 10.1111/pce.13899