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Precipitation variability and primary productivity in water‐limited ecosystems: how plants ‘leverage’ precipitation to ‘finance’ growth
Author(s) -
Fay Philip A.
Publication year - 2009
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.2008.02695.x
Subject(s) - precipitation , leverage (statistics) , ecosystem , primary productivity , environmental science , productivity , natural resource economics , ecology , economics , biology , geography , mathematics , statistics , macroeconomics , meteorology
indicated that these mutants possess about 50% residual transport activity in vitro (Eren et al., 2007). Furthermore, Wong et al. found that the cytoplasmic C-terminus, which contains three Zn-binding sites and has been speculated to have a regulatory role (Eren et al., 2006), is not essential for HMA2 function in either Zn or Cd transport in planta. In continuation of this work it would be interesting to know whether the C-terminus is important when plants are moved from normal to high-Zn substrates. Taken together, these studies suggest that future mutagenesis approaches aiming to separate Zn and Cd transport functions should primarily target residues in the central portion of the HMA2 protein containing the eight transmembrane helixes. In summary, the two publications by Wong et al. and Wong & Cobbett in this issue of New Phytologist are elegant, well-designed and insightful contributions to a topic of major current research interest.