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Photosynthetic gas exchange, modulated chlorophyll fluorescence, rapid fluorescence induction kinetics, and the polyphasic fluorescence transients were used to evaluate PSII photochemsitry in the halophyte Suaeda salsa exposed to a combination of high salinity (100–400 mM NaCl) and heat stress...
Temperature caused phenomenal modulation of phospho enol pyruvate carboxylase (PEPC, EC 188.8.131.52) in leaf discs of Amaranthus hypochondriacus (NAD‐ME type C 4 species), compared to the pattern in Pisum sativum (a C 3 plant). The optimal incubation temperature for PEPC in A. hypochondriacus (C 4...
In higher plants the vacuolar K + ‐selective (VK) channel was identified solely in guard cells. This patch‐clamp study describes a 40 pS homologue of the VK channel in Beta vulgaris taproot vacuoles. This voltage‐independent channel is activated by submicromolar Ca 2+ , and is ideally...
Two genomic clones corresponding to putative pectate lyase genes ( plA and plB ) were isolated and characterized in strawberry ( Fragaria × ananassa cv. Chandler). The corresponding ORFs for the plA and plB genes revealed deduced proteins of 451 and 439 amino acids, respectively, that differ...
St MBF1 ( Solanum tuberosum multiprotein bridging factor 1) is a plant member of the MBF1 family of transcriptional co‐activators. Previously, it has been described as being up‐regulated at the transcrip tional level by fungal and abiotic stress. To understand whether St MBF1 is also...
In the Arabidopsis mutant sdd1‐1 , a point mutation in a single gene ( SDD1 ) causes specific alterations in stomatal density and distribution. In comparison to the wild type (C24), abaxial surfaces of sdd1‐1 rosette leaves have about 2.5‐fold higher stomatal densities. This mutant was used...
In order to investigate the physiological role of ethylene in the initiation and subsequent progression of softening, pear fruit were treated with propylene, an analogue of ethylene or 1‐methylcyclopropene (1‐MCP), a gaseous inhibitor of ethylene action at the preclimacteric or ripening...
Significant night‐time stomatal conductance and transpiration were found for 11 out of 17 species with a range of life histories (herbaceous annual, perennial grass, shrub, tree), photosynthetic pathways (C 3 , C 4 ), and habitats in the western United States. Across species and habitats,...
A DNA fragment corresponding to part of an SNF1 (sucrose non‐fermenting‐1)‐related protein kinase (SnRK1) transcript was amplified by a polymerase chain reaction (PCR) from a wheat ( Triticum aestivum ) endosperm cDNA library. It was used to construct a chimaeric gene, pUasSnRKN, comprising...
Cyanobacteria have evolved an extremely effective single‐cell CO 2 concentrating mechanism (CCM). Recent molecular, biochemical and physiological studies have significantly extended current knowledge about the genes and protein components of this system and how they operate to elevate CO 2...
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