Premium
Seasonal variation in hydrochloric acid, malic acid, and calciumions secreted by the trichomes of chickpea ( Cicer arietinum )
Author(s) -
Lazzaro Mark D.,
Thomson William W.
Publication year - 1995
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1995.tb05314.x
Subject(s) - malic acid , calcium , chloride , hydrochloric acid , ion , hydrogen ion , chemistry , zoology , trichome , botany , nuclear chemistry , biochemistry , biology , inorganic chemistry , citric acid , organic chemistry
The concentrations of malate. calcium ions. hydrogen ions, and chloride ions were measured in secretions collected between June 1991 and May 1992 from the secretory trichomes of chickpea ( Cicer arietinum L.). The average malate concentration was 114 m M and varied from 2 to 287 m M , the average chloride ion concentration was 177 m M and varied from 68 to 355 m M . and the average calcium ion concentration was 0.82 m M and varied from 0.24 to 1.97 m M . The variability in malate. chloride ions, and calcium ions closely followed the sinusoidal variation in the amount of solar radiation per day throughout the year (Riverside. CA. USA). Also. 77% of the variation in malate concentration, 51% of the variation in chloride ion concentration, and 67% of the variation in calcium ion concentration in collected secretions was directly dependent on the day of the year. In addition, the average hydrogen ion concentration was 299 m M , which corresponds to a pH of 0.52. Although the concentration of hydrogen ions varied from 195 m M (pH 0.71) to 417 m M (pH 0.38) throughout the year, the variation did not follow any clear pattern with respect to the day of the year. These data suggest that malate. chloride ion, and calcium ion secretion are linked to the amount of daily sunlight and to the day of the year while the pH of secretions is not directly linked to light level.