Plant biology

Sweet Signals in Plants

Science's STKE  15 Apr 2003:
Vol. 2003, Issue 178, pp. tw152
DOI: 10.1126/stke.2003.178.tw152

Glucose is a nutritional component for plants; its availability supports various physiological responses. Moore et al. (see the Perspective by Frommer et al.) now show that glucose also functions as a signaling molecule to relate physiological responses such as growth, development, and senescence to photosynthetic productivity and other environmental resources. Analysis of mutant plants defective in a hexokinase enzyme shows that some of the signaling functions continue to operate even in the absence of catalytic activity for glucose processing.

B. Moore, L. Zhou, F. Rolland, Q. Hall, W.-H. Cheng, Y.-X. Liu, I. Hwang, T. Jones, J. Sheen, Role of the Arabidopsis glucose sensor HXK1 in nutrient, light, and hormonal signaling. Science 300, 332-336 (2003). [Abstract] [Full Text]

W. B. Frommer, W. X. Schulze, S. Lalonde, Hexokinase, jack-of-all-trades. Science 300, 261-263 (2003). [Summary] [Full Text]