A sepal-expressed ADP-glucose pyrophosphorylase gene (NtAGP) is required for petal expansion growth in 'Xanthi' tobacco

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dc.contributor.authorM S Kwak-
dc.contributor.authorSung Ran Min-
dc.contributor.authorS M Lee-
dc.contributor.authorK N Kim-
dc.contributor.authorJang Ryol Liu-
dc.contributor.authorK H Paek-
dc.contributor.authorJ S Shin-
dc.contributor.authorJ M Bae-
dc.date.accessioned2017-04-19T09:07:52Z-
dc.date.available2017-04-19T09:07:52Z-
dc.date.issued2007-
dc.identifier.issn0032-0889-
dc.identifier.uri10.1104/pp.107.102095ko
dc.identifier.urihttps://oak.kribb.re.kr/handle/201005/8051-
dc.description.abstractIn this study, a tobacco (Nicotiana tabacum 'Xanthi') ADP-glucose pyrophosphorylase cDNA (NtAGP) was isolated from a flower bud cDNA library and the role of NtAGP in the growth of the floral organ was characterized. The expression of NtAGP was high in the sepal, moderate in the carpel and stamen, and low in the petal tissues. NtAGP-antisense plants produced flowers with abnormal petal limbs due to the early termination of the expansion growth of the petal limbs between the corolla lobes. Microscopic observation of the limb region revealed that cell expansion was limited in NtAGP-antisense plants but that cell numbers remained unchanged. mRNA levels of NtAGP, ADP-glucose pyrophosphorylase activity, and starch content in the sepal tissues of NtAGP-antisense plants were reduced, resulting in significantly lower levels of sugars (sucrose, glucose, and fructose) in the petal limbs. The feeding of these sugars to flower buds of the NtAGP-antisense plants restored the expansion growth in the limb area between the corolla lobes. Expansion growth of the petal limb between the corolla lobes was severely arrested in 'Xanthi' flowers from which sepals were removed, indicating that sepal carbohydrates are essential for petal limb expansion growth. These results demonstrate that NtAGP plays a crucial role in the morphogenesis of petal limbs in 'Xanthi' through the synthesis of starch, which is the main carbohydrate source for expansion growth of petal limbs, in sepal tissues.-
dc.publisherAmer Soc Plant Biologists-
dc.titleA sepal-expressed ADP-glucose pyrophosphorylase gene (NtAGP) is required for petal expansion growth in 'Xanthi' tobacco-
dc.title.alternativeA sepal-expressed ADP-glucose pyrophosphorylase gene (NtAGP) is required for petal expansion growth in 'Xanthi' tobacco-
dc.typeArticle-
dc.citation.titlePlant Physiology-
dc.citation.number1-
dc.citation.endPage289-
dc.citation.startPage277-
dc.citation.volume145-
dc.contributor.affiliatedAuthorSung Ran Min-
dc.contributor.affiliatedAuthorJang Ryol Liu-
dc.contributor.alternativeName곽만섭-
dc.contributor.alternativeName민성란-
dc.contributor.alternativeName이시명-
dc.contributor.alternativeName김경남-
dc.contributor.alternativeName유장렬-
dc.contributor.alternativeName백경희-
dc.contributor.alternativeName신정섭-
dc.contributor.alternativeName배정명-
dc.identifier.bibliographicCitationPlant Physiology, vol. 145, no. 1, pp. 277-289-
dc.identifier.doi10.1104/pp.107.102095-
dc.description.journalClassY-
Appears in Collections:
Division of Research on National Challenges > Plant Systems Engineering Research > 1. Journal Articles
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