DOI: 10.1073/pnas.1900644116
论文题名: Development and evolution of age-dependent defenses in ant-acacias
作者: Leichty A.R. ; Scott Poethiga R.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2019
卷: 116, 期: 31 起始页码: 15596
结束页码: 15601
语种: 英语
英文关键词: Age-dependent defenses
; Ant-acacia
; miR156
; SPL
; Vegetative-phase change
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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163545
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
Leichty A.R.,Scott Poethiga R.. Development and evolution of age-dependent defenses in ant-acacias[J]. Proceedings of the National Academy of Sciences of the United States of America,2019-01-01,116(31)