Электронный архив

The homoeologous genes encoding C24-sterol methyltransferase 1 in triticum aestivum: Structural characteristics and effects of cold stress

Показать сокращенную информацию

dc.contributor.author Renkova A.
dc.contributor.author Valitova J.
dc.contributor.author Schaller H.
dc.contributor.author Minibayeva F.
dc.date.accessioned 2020-01-15T20:52:21Z
dc.date.available 2020-01-15T20:52:21Z
dc.date.issued 2019
dc.identifier.issn 0006-3134
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/155475
dc.description.abstract © 2019, Springer Netherlands. All rights reserved. A unique structural feature of plant sterols is the presence of a 24-alkyl group in the sterol side chain, which is synthesized by C24-sterol methyltransferase (SMT). Here we report for the first time that the bread wheat genome (AABBDD) contains at least three homoeologous genes encoding C24-sterol methyltransferase 1. While these copies have similar coding regions, they differ markedly in the nucleotide sequences of their non-coding regions. Sequencing de novo of the promoter regions of the TaSMT1 homoeologs demonstrated the occurrence of common and specific stress-sensitive cis-elements such as LTR, the cis-element involved in low temperature response. These cis-elements, along with other factors, determine the differences in the effects of stress on the expression of homoeologous TaSMT1 genes. For example, TaSMT1-5A is constitutively expressed in the roots and leaves, while TaSMT1-4D gene is highly stress-responsive. Another important enzyme involved in sterol biosynthesis is C22-sterol desaturase, which converts β-sitosterol into stigmasterol. This enzyme is encoded by homoeologous TaCYP710A8 genes, which, in contrast to TaSMT1, are all up-regulated in response to stress. Cold-induced expression of TaCYP710A8 is greater in roots than in leaves. This may be due to the higher cold sensitivity of the roots and the necessity to increase the amount of stigmasterol known as a “stress sterol”. Our findings suggest that the existence of homoeologous genes of sterol biosynthesis in polyploid plants supports the diversity of genetic mechanisms of sterol-mediated response of plants to stresses.
dc.relation.ispartofseries Biologia Plantarum
dc.subject Additional gene expression
dc.subject C22-sterol desaturase
dc.subject Cis-elements
dc.title The homoeologous genes encoding C24-sterol methyltransferase 1 in triticum aestivum: Structural characteristics and effects of cold stress
dc.type Article
dc.relation.ispartofseries-volume 63
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 59
dc.source.id SCOPUS00063134-2019-63-SID85067694665


Файлы в этом документе

Данный элемент включен в следующие коллекции

  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

Показать сокращенную информацию

Поиск в электронном архиве


Расширенный поиск

Просмотр

Моя учетная запись

Статистика