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The Parasitic Plant Cuscuta australis Is Highly Insensitive to Abscisic Acid-Induced Suppression of Hypocotyl Elongation and Seed Germination
Li, Juan; Hettenhausen, Christian; Sun, Guiling; Zhuang, Huifu; Li, Jian-Hong; Wu, Jianqiang
2015-08-10
Source PublicationPLOS ONE
Volume10Issue:8
AbstractAround 1% of angiosperms are parasitic plants. Their growth and development solely or partly depend on host plants from which they extract water, nutrients, and other molecules using a parasitic plant-specific organ, the haustorium. Strong depletion of nutrients can result in serious growth retardation and in some cases, death of the hosts. The genus Cuscuta (dodder) comprises about 200 holoparasitic species occurring on all continents. Their seedlings have no roots and cotyledons but are only string-like hypocotyls. When they contact suitable host plants, haustoria are formed and thereafter seedlings rapidly develop into vigorously growing branches without roots and leaves. This highly specialized lifestyle suggests that Cuscuta plants likely have unique physiology in development and stress responses. Using germination and seedling growth assays, we show that C. australis seeds and seedlings are highly insensitive to abscisic acid (ABA). Transcriptome analysis and protein sequence alignment with Arabidopsis, tomato, and rice homologs revealed that C. australis most likely consists of only four functional ABA receptors. Given that Cuscuta plants are no longer severely challenged by drought stress, we hypothesize that the ABA-mediated drought resistance pathway in Cuscuta spp. might have had degenerated over time during evolution.
DOI10.1371/journal.pone.0135197
Indexed BySCI
Language英语
WOS IDWOS:000359352600046
Citation statistics
Document Type期刊论文
Identifierhttp://ir.kib.ac.cn/handle/151853/25091
Collection资源植物与生物技术所级重点实验室
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GB/T 7714
Li, Juan,Hettenhausen, Christian,Sun, Guiling,et al. The Parasitic Plant Cuscuta australis Is Highly Insensitive to Abscisic Acid-Induced Suppression of Hypocotyl Elongation and Seed Germination[J]. PLOS ONE,2015,10(8).
APA Li, Juan,Hettenhausen, Christian,Sun, Guiling,Zhuang, Huifu,Li, Jian-Hong,&Wu, Jianqiang.(2015).The Parasitic Plant Cuscuta australis Is Highly Insensitive to Abscisic Acid-Induced Suppression of Hypocotyl Elongation and Seed Germination.PLOS ONE,10(8).
MLA Li, Juan,et al."The Parasitic Plant Cuscuta australis Is Highly Insensitive to Abscisic Acid-Induced Suppression of Hypocotyl Elongation and Seed Germination".PLOS ONE 10.8(2015).
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