Lefoulon, Cecile published the artcileCrassulacean acid metabolism guard cell anion channel activity follows transcript abundance and is suppressed by apoplastic malate, Product Details of C4H6O5, the main research area is crassulacean acid metabolism guard cell anion channel apoplastic malate; Kalanchoë fedtschenkoi ; apoplast; circadian stomatal regulation; crassulacean acid metabolism; guard cell anion channel; malic acid metabolism; voltage clamp.
Plants utilizing crassulacean acid metabolism (CAM) concentrate CO2 around RuBisCO while reducing transpirational water loss associated with photosynthesis. Unlike stomata of C3 and C4 species, CAM stomata open at night for the mesophyll to fix CO2 into malate (Mal) and store it in the vacuole. CAM plants decarboxylate Mal in the light, generating high CO2 concentrations within the leaf behind closed stomata for refixation by RuBisCO. CO2 may contribute to stomatal closure but addnl. mechanisms, plausibly including Mal activation of anion channels, ensure closure in the light. In the CAM species Kalanchoe fedtschenkoi, we found that guard cell anion channel activity, recorded under voltage clamp, follows KfSLAC1 and KfALMT12 transcript abundance, declining to near zero by the end of the light period. Unexpectedly, however, we found that extracellular Mal inhibited the anion current of Kalanchoe guard cells, both in wild-type and RNAi mutants with impaired Mal metabolism We conclude that the diurnal cycle of anion channel gene transcription, rather than the physiol. signal of Mal release, is a key factor in the inverted CAM stomatal cycle.
New Phytologist published new progress about Anion channels Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 97-67-6 belongs to class alcohols-buliding-blocks, name is (S)-2-hydroxysuccinic acid, and the molecular formula is C4H6O5, Product Details of C4H6O5.
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