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Plant Signal Behav

Title:		Herbivory of maize by southern corn rootworm induces expression of the major intrinsic protein ZmNIP1;1 and leads to the discovery of a novel aquaporin ZmPIP2;8
Author(s):		Lawrence SD; Novak NG; Xu H; Cooke JE;
Address:		"USDA-ARS; Invasive Insect Biocontrol and Behavior Lab; BARC-West; Beltsville, MD USA"
Journal Title:		Plant Signal Behav
Year:		2013
Volume:		20130515
Issue:		8
Page Number:		-
DOI:		10.4161/psb.24937
ISSN/ISBN:		1559-2324 (Electronic) 1559-2316 (Print) 1559-2316 (Linking)
Abstract:		"Aquaporins channel water and other neutral molecules through cell membranes. Aquaporin gene expression is subject to transcriptional control and can be modulated by factors affecting water balance such as salt, abscisic acid and drought. During infestation of maize by southern corn rootworm (SCR), an insect that chews into and significantly damages maize roots, three maize aquaporins were differentially expressed upon prolonged infestation. Using a brief infestation of maize roots ZmNIP1;1 transcript abundance again increased under infestation while expression of a new aquaporin, ZmPIP2;8 and ZmTIP2;2 expression did not change. Since ZmPIP2;8 has not been described previously, the deduced protein sequence was analyzed in silico and found to contain the hallmarks of plant aquaporins, with a predicted protein structure similar to other functionally characterized PIP2s. NIPs characterized to date have been implicated in facilitating the movement of a variety of small molecules, while TIPs and PIPs often have the capacity to facilitate trans-membrane movement of water. Functional assays (using heterologous expression in Xenopus laevis oocytes) of ZmTIP2;2 and ZmPIP2;8 confirmed that these aquaporins demonstrate water channel capacity"
Keywords:		"Amino Acid Sequence Animals Aquaporins/chemistry/*genetics/metabolism Cell Membrane Permeability Coleoptera/*physiology Conserved Sequence *Gene Expression Regulation, Plant Herbivory/*physiology Molecular Sequence Data Oocytes/cytology Plant Diseases/gen;"
Notes:		"MedlineLawrence, Susan D Novak, Nicole G Xu, Hao Cooke, Janice E K eng 2013/05/16 Plant Signal Behav. 2013 Aug; 8(8):e24937. doi: 10.4161/psb.24937. Epub 2013 May 15"