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Search: WFRF:(Kim Kim Yun) > (2010-2014) > ATHB12, an ABA-Indu...

LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00003852naa a2200601 4500
001oai:DiVA.org:uu-134820
003SwePub
008101201s2010 | |||||||||||000 ||eng|
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-1348202 URI
0247 a https://doi.org/10.1093/pcp/pcq1082 DOI
040 a (SwePub)uu
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
1001 a Son, Ora4 aut
2451 0a ATHB12, an ABA-Inducible Homeodomain-Leucine Zipper (HD-Zip) Protein of Arabidopsis, Negatively Regulates the Growth of the Inflorescence Stem by Decreasing the Expression of a Gibberellin 20-Oxidase Gene
264 c 2010-07-28
264 1b Oxford University Press (OUP),c 2010
338 a print2 rdacarrier
520 a Arabidopsis thaliana homeobox 12 (ATHB12) is rapidly induced by ABA and water stress. A T-DNA insertion mutant of ATHB12 with a reduced level of ATHB12 expression in stems had longer inflorescence stems and reduced sensitivity to ABA during germination. A high level of transcripts of gibberellin 20-oxidase 1 (GA20ox1), a key enzyme in the synthesis of gibberellins, was detected in athb12 stems, while transgenic lines overexpressing ATHB12 (A12OX) had a reduced level of GA20ox1 in stems. Consistent with these data, ABA treatment of wild-type plants resulted in decreased GA20ox1 expression whereas ABA treatment of the athb12 mutant gave rise to slightly decreased GA20ox1 expression. Retarded stem growth in 3-week-old A12OX plants was rescued by exogenous GA(9), but not by GA(12), and less GA(9) was detected in A12OX stems than in wild-type stems. These data imply that ATHB12 decreases GA20ox1 expression in stems. On the other hand, the stems of A12OX plants grew rapidly after the first 3 weeks, so that they were almost as high as wild-type plants at about 5 weeks after germination. We also found changes in the stems of transgenic plants overexpressing ATHB12, such as alterations of expression GA20ox and GA3ox genes, and of GA(4) levels, which appear to result from feedback regulation. Repression of GA20ox1 by ATHB12 was confirmed by transfection of leaf protoplasts. ABA-treated protoplasts also showed increased ATHB12 expression and reduced GA20ox1 expression. These findings all suggest that ATHB12 negatively regulates the expression of a GA 20-oxidase gene in inflorescence stems.
650 7a NATURVETENSKAPx Biologi0 (SwePub)1062 hsv//swe
650 7a NATURAL SCIENCESx Biological Sciences0 (SwePub)1062 hsv//eng
653 a ABA
653 a ATHB12
653 a GA20ox1
653 a Gibberellic acid
653 a Homeobox
653 a Biology
653 a Biologi
7001 a Hur, Yoon-Sun4 aut
7001 a Kim, Yun-Kyung4 aut
7001 a Lee, Hyun-Jung4 aut
7001 a Kim, Sunghan4 aut
7001 a Kim, Mi-Ran4 aut
7001 a Nam, Kyoung Hee4 aut
7001 a Lee, Myung-Sok4 aut
7001 a Kim, Bu-Yong4 aut
7001 a Park, Jongbum4 aut
7001 a Park, Jungan4 aut
7001 a Lee, Suk-Chan4 aut
7001 a Hanada, Atsushi4 aut
7001 a Yamaguchi, Shinjiro4 aut
7001 a Lee, In-Jung4 aut
7001 a Kim, Seoung-Ki4 aut
7001 a Yun, Dae-Jin4 aut
7001 a Söderman, Evau Uppsala universitet,Institutionen för ekologi och genetik4 aut
7001 a Cheon, Choong-Ill4 aut
7102 a Uppsala universitetb Institutionen för ekologi och genetik4 org
7730 t Plant and Cell Physiologyd : Oxford University Press (OUP)g 51:9, s. 1537-1547q 51:9<1537-1547x 0032-0781x 1471-9053
8564 u https://academic.oup.com/pcp/article-pdf/51/9/1537/19285746/pcq108.pdf
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-134820
8564 8u https://doi.org/10.1093/pcp/pcq108

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