气候变化领域集成服务门户(CCPortal): Development and evolution of age-dependent defenses in ant-acacias

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DOI	10.1073/pnas.1900644116
	Development and evolution of age-dependent defenses in ant-acacias
	Leichty A.R.; Scott Poethiga R.
发表日期	2019
ISSN	0027-8424
起始页码	15596
结束页码	15601
卷号	116 期号:31
英文摘要	Age-dependent changes in plant defense against herbivores are widespread, but why these changes exist remains a mystery. We explored this question by examining a suite of traits required for the interaction between swollen thorn acacias (genus Vachellia) and ants of the genus Pseudomyrmex. In this system, plants provide ants with refuge and food in the form of swollen stipular spines, protein-lipid-rich "Beltian" bodies, and sugar-secreting extrafloral nectaries—the "swollen thorn syndrome." We show that this syndrome develops at a predictable time in shoot development and is tightly associated with the temporal decline in the microRNAs miR156 and miR157 and a corresponding increase in their targets— the SPL transcription factors. Growth under reduced light intensity delays both the decline in miR156/157 and the development of the swollen thorn syndrome, supporting the conclusion that these traits are controlled by the miR156-SPL pathway. Production of extrafloral nectaries by Vachellia sp. that do not house ants is also correlated with a decline in miR156/157, suggesting that this syndrome evolved by co-opting a preexisting age-dependent program. Along with genetic evidence from other model systems, these findings support the hypothesis that the age-dependent development of the swollen thorn syndrome is a consequence of genetic regulation rather than a passive developmental pattern arising from developmental constraints on when these traits can develop. © 2019 National Academy of Sciences. All rights reserved.
英文关键词	Age-dependent defenses; Ant-acacia; miR156; SPL; Vegetative-phase change
语种	英语
scopus关键词	microRNA; microRNA 156; microRNA 157; unclassified drug; microRNA; plant RNA; age; animal food; ant; Article; controlled study; correlational study; defense mechanism; evolution; gene identification; gene sequence; genetic regulation; light intensity; nectary; nonhuman; organismal interaction; plant development; plant genome; plant growth; priority journal; shoot; species refuge; Vachellia; Acacia; animal; ant; genetics; metabolism; physiology; Acacia; Animals; Ants; Biological Evolution; MicroRNAs; RNA, Plant
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160360
作者单位	Leichty, A.R., Department of Biology, University of Pennsylvania, Philadelphia, PA 19104, United States, Department of Plant Biology, University of California, Davis, CA 95616, United States; Scott Poethiga, R., Department of Biology, University of Pennsylvania, Philadelphia, PA 19104, United States
推荐引用方式 GB/T 7714	Leichty A.R.,Scott Poethiga R.. Development and evolution of age-dependent defenses in ant-acacias[J],2019,116(31).
APA	Leichty A.R.,&Scott Poethiga R..(2019).Development and evolution of age-dependent defenses in ant-acacias.Proceedings of the National Academy of Sciences of the United States of America,116(31).
MLA	Leichty A.R.,et al."Development and evolution of age-dependent defenses in ant-acacias".Proceedings of the National Academy of Sciences of the United States of America 116.31(2019).