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Preferential accumulation of betaine uncoupled to choline monooxygenase in young leaves of sugar beet--importance of long-distance translocation of betaine under normal and salt-stressed conditions

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dc.contributor.author Yamada, Nana
dc.contributor.author Promden, Worrawat
dc.contributor.author Yamane, Koji
dc.contributor.author Tamagake, Hideto
dc.contributor.author Hibino, Takashi
dc.contributor.author Tanaka, Yoshito
dc.contributor.author Takabe, Teruhiro
dc.date.accessioned 2018-03-28T07:42:53Z
dc.date.available 2018-03-28T07:42:53Z
dc.date.issued 2009-06
dc.identifier.citation Journal of Plant Physiology [03 Aug 2009, 166(18):2058-2070] en_US
dc.identifier.issn 0176-1617
dc.identifier.uri http://dspace.bru.ac.th/xmlui/handle/123456789/4101
dc.description.abstract It has been reported that glycinebetaine (betaine) is synthesized in response to abiotic stresses via a two-step oxidation of choline in which choline monooxygenase (CMO) and betaine aldehyde dehydrogenase (BADH) are involved. Here we show that significant amounts of betaine, > 20 micromol/gFW, accumulated in young leaves of Beta vulgaris even under normal growth conditions, whereas levels in old leaves, cotyledons, hypocotyls, and roots were low. Under the same conditions, CMO accumulates exclusively in old leaves and is difficult to be detected in young leaves. By contrast, the levels of BADH were high in all tissues. Exogenously supplied choline was converted into betaine in old leaves, but levels were significantly lower in young leaves under the same conditions. When d(11)-betaine was applied exogenously to old leaves, it was translocated preferentially into young leaves and roots. In response to salt stress, betaine levels increased in all tissues, but most significantly increased in young leaves. The levels of CMO increased in various tissues, but were low in young leaves. A betaine transporter gene was isolated. Its expression was more strongly induced in old leaves than in young leaves. Based on these data, we discussed the role of CMO and betaine transporter under stress and non-stress conditions. en_US
dc.language.iso en_US en_US
dc.publisher มหาวิทยาลัยราชภัฏบุรีรัมย์ en_US
dc.subject choline monooxygenase en_US
dc.subject sugar beet en_US
dc.subject salt-stressed conditions en_US
dc.subject Beta vulgaris en_US
dc.title Preferential accumulation of betaine uncoupled to choline monooxygenase in young leaves of sugar beet--importance of long-distance translocation of betaine under normal and salt-stressed conditions en_US
dc.title.alternative Preferential accumulation of betaine uncoupled to choline monooxygenase in young leaves of sugar beet--importance of long-distance translocation of betaine under normal and salt-stressed conditions en_US
dc.type Article en_US


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