Ecophysiological Characteristics Of Calcicole And Calcifuge Responding To Exteral Ca～(2+) Concentration

Objects: this papar is primary work for Ca²⁺ adapting mechanism of calcicole. Calcicole andcalcifuge were studied as objects in different environments. There was more change inEurycorymbus caraleriei, by comparing the change rule of physiological biochemistry andanatomy of calcicole and calcifuge. For know the calcicole characteristics responding to externalCa²⁺ concentration. Methods: I refer to the reference to design the thesis technical route. Theexperiment of calcicole and calcifuge adopt method: the anatomy is a general olefin slice up,physiological biochemistry and the element value of meterial was AAS. The statistic useSPSS11.5 software to analyze. Conclusion: (1) Althouth there existed great morphological andanatomic difference between calcicole and calcifuge, external Ca²⁺ couldn't evidently change theoriginated structure because of the shorter treated time. In addition, the dry weight ofEurycorymbus caraleriei, a species of calcicole, increased with the increase of external Ca²⁺concentration, while that of Rhododendron decorum, a species of calcifuge, decreased in such acase. (2)After the two species of plants were added with different amount of Ca²⁺ in field study,there were more change in E. caraleriei than in R. decorum. For E. caraleriei, Ca²⁺ improvedplant growth, and increased the content of chlorophyll and protein, but had no effect on thecontent of proline and soluble sugars. For R. decorum, Ca²⁺ decreased the content of chlorophylland protein, while increased the content of proline and soluble sugars.(3)The elementbackground value of plants was linearly related to that of rock and soil, and was influencedmainly by the change of Ca²⁺ content. The results of internal Ca2+ accumulation responding theincrease of external Ca²⁺ showed that E. caraleriei and R. decorum were different in efficiencyof Ca²⁺ absorption and position of Ca²⁺ accumulation, as well as, E. caraleriei accumulatedhigher Ca²⁺ content than R. decorum. It was presumed that the difference between calcicole andcalcifuge is controled mainly by environment and genetics. Signification: The study was a basisfor Ca²⁺ adopt of mechanism on calcicole, and at the same time afford correspond datum also forprotect envionment and develop agricultule production in karst areas.