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Arabidopsis annexin1 mediates the radical-activated plasma membrane Ca2+- and K+-permeable conductance in root cells


Laohavisit, A and Shang, Z and Rubio, L and Cuin, TA and Very, A-A and Wang, A and Mortimer, JC and Macpherson, N and Coxon, KM and Battey, NH and Brownlee, C and Park, OK and Sentenac, H and Shabala, S and Webb, AAR and Davies, JM, Arabidopsis annexin1 mediates the radical-activated plasma membrane Ca2+- and K+-permeable conductance in root cells, Plant Cell, 24, (4) pp. 1522-1533. ISSN 1040-4651 (2012) [Refereed Article]

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Copyright 2012 American Society of Plant Biologists

DOI: doi:10.1105/tpc.112.097881


The genus Asparagus is unusual in producing axillary, determinate organs called cladodes, which may take on either a flattened or cylindrical form. Here, we investigated the evolution of cladodes to elucidate the mechanisms at play in the diversification of shoot morphology. Our observations of Asparagus asparagoides, which has leaf-like cladodes, showed that its cladodes are anatomically and developmentally similar to leaves but differ in the adaxial/abaxial polarity of the vasculature. In addition to the expression of an ortholog of KNAT1, orthologous genes that are normally expressed in leaves, ASYMMETRIC LEAVES1 and HD-ZIPIII, were found to be expressed in cladode primordia in a leaf-like manner. The cylindrical cladodes of Asparagus officinalis showed largely similar expression patterns but showed evidence of being genetically abaxialized. These results provide evidence that cladodes are modified axillary shoots, suggest that the co-option of preexisting gene networks involved in leaf development transferred the leaf-like form to axillary shoots, and imply that altered expression of leaf polarity genes led to the evolution of cylindrical cladodes in the A. officinalis clade

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Plant physiology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Horticultural crops
Objective Field:Horticultural crops not elsewhere classified
UTAS Author:Cuin, TA (Dr Tracey Cuin)
UTAS Author:Shabala, S (Professor Sergey Shabala)
ID Code:77603
Year Published:2012
Web of Science® Times Cited:128
Deposited By:Agricultural Science
Deposited On:2012-05-10
Last Modified:2017-11-23

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