Role of ABA and ABI3 in Desiccation Tolerance

• DOI: 10.1126/science.1183672
• Publication Date: 2010-01-28T19:25:29Z
• Authors: A. Khandelwal; S. H. Cho; H. Marella; Y. Sakata; P.-F. Perroud; A. Pan; R. S. Quatrano
• Keywords: Physcomitrella patens; Desiccation Tolerance; Bryopsida; Wild type

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 seed during desiccation. was not able stable deletion lines ABI3 (DeltaPpabi3). Hence, has same functional link between ABA, ABI3, tolerance phenotype is found angiosperms. Furthermore, we identified 22 genes were induced wild-type lines. When their expression compared with DeltaPpabi3 immediately after desiccation, a new target action appears be recovery period.