NDLI: The Hevea brasiliensis XIP aquaporin subfamily: genomic, structural and functional characterizations with relevance to intensive latex harvesting

Content Provider	Springer Nature Link
Author	Lopez, David Amira, Maroua Ben Brown, Daniel Muries, Beatriz Brunel Michac, Nicole Bourgerie, Sylvain Porcheron, Beit Lemoine, Remi Chrestin, Hervé Mollison, Ewan Cola, Alessandra Frigerio, Lorenzo Julien, Jean Louis Gousset Dupont, Aurélie Fumanal, Boris Label, Philippe Pujade Renaud, Valérie Auguin, Daniel Venisse, Jean Stéphane
Copyright Year	2016
Abstract	X-Intrinsic Proteins (XIP) were recently identified in a narrow range of plants as a full clade within the aquaporins. These channels reportedly facilitate the transport of a wide range of hydrophobic solutes. The functional roles of XIP in planta remain poorly identified. In this study, we found three XIP genes (HbXIP1;1, HbXIP2;1 and HbXIP3;1) in the Hevea brasiliensis genome. Comprehensive bioinformatics, biochemical and structural analyses were used to acquire a better understanding of this AQP subfamily. Phylogenetic analysis revealed that HbXIPs clustered into two major groups, each distributed in a specific lineage of the order Malpighiales. Tissue-specific expression profiles showed that only HbXIP2;1 was expressed in all the vegetative tissues tested (leaves, stem, bark, xylem and latex), suggesting that HbXIP2;1 could take part in a wide range of cellular processes. This is particularly relevant to the rubber-producing laticiferous system, where this isoform was found to be up-regulated during tapping and ethylene treatments. Furthermore, the XIP transcriptional pattern is significantly correlated to latex production level. Structural comparison with SoPIP2;1 from Spinacia oleracea species provides new insights into the possible role of structural checkpoints by which HbXIP2;1 ensures glycerol transfer across the membrane. From these results, we discuss the physiological involvement of glycerol and HbXIP2;1 in water homeostasis and carbon stream of challenged laticifers. The characterization of HbXIP2;1 during rubber tree tapping lends new insights into molecular and physiological response processes of laticifer metabolism in the context of latex exploitation.
Starting Page	375
Ending Page	396
Page Count	22
File Format	PDF
ISSN	01674412
Journal	Plant Molecular Biology
Volume Number	91
Issue Number	4-5
e-ISSN	15735028
Language	English
Publisher	Springer Netherlands
Publisher Date	2016-04-11
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	XIP aquaporin Hevea brasiliensis Latex Evolution Glycerol Cell homeostasis Plant Sciences Biochemistry Plant Pathology
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science Medicine Agronomy and Crop Science

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The Hevea brasiliensis XIP aquaporin subfamily: genomic, structural and functional characterizations with relevance to intensive latex harvesting

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The Hevea brasiliensis XIP aquaporin subfamily: genomic, structural and functional characterizations with relevance to intensive latex harvesting