Role of ABA and ABI3 in Desiccation Tolerance
Role of ABA and ABI3 in Desiccation Tolerance
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DOI：
10.1126/science.1183672
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发表时间：
2010-01-29
期刊：
影响因子：
56.9
通讯作者：
Quatrano, R. S.
中科院分区：
文献类型：
--
作者：
Khandelwal, A.;Cho, S. H.;Quatrano, R. S.
我们表明，脱落酸（阿坝）预处理的苔藓（小立碗藓）细胞赋予干燥耐受性。在被子植物中，阿坝和转录调节因子脱落酸不敏感3（ABI3）都是在干燥过程中保护种子所必需的。阿坝不能保护ABI 3稳定缺失系（ΔPpabi3）中的苔藓细胞。因此，苔藓在阿坝、ABI3和被子植物中发现的脱水耐受表型之间具有相同的功能联系。此外，我们确定了22个基因，阿坝预处理过程中诱导的野生型品系。当将它们的表达与阿坝预处理期间和干燥后立即的ΔPpabi3的表达进行比较时，ABI3作用的新靶点似乎是在恢复期。
We show in bryophytes that abscisic acid (ABA) pretreatment of moss (Physcomitrella patens) cells confers desiccation tolerance. In angiosperms, both ABA and the transcriptional regulator ABSCISIC ACID INSENSITIVE 3 (ABI3) are required to protect the seed during desiccation. ABA was not able to protect moss cells in stable deletion lines of ABI3 (ΔPpabi3). Hence, moss has the same functional link between ABA, ABI3, and the desiccation tolerance phenotype that is found in angiosperms. Furthermore, we identified 22 genes that were induced during ABA pretreatment in wild-type lines. When their expression was compared with that of ΔPpabi3 during ABA pretreatment and immediately after desiccation, a new target of ABI3 action appears to be in the recovery period.