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KMID : 0368419800230010017
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Journal of Plant Biology
1980 Volume.23 No. 1 p.17 ~ p.25
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Effects of Al-Surplus and Ca-Deficiency on Content and Rhythm of ATP in Plant Leaves
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Sung Min-Woong
Kwon Byung-Kyu
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Abstract
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Kidneybean (Phaseolus vlgaris L.) and buckwheat (Fagopyrum esculentum Mo¨nch) seedlings cultured with Hoagland solution to the height of 7 to 10㎝ in the earthen pot containing sand were used for experimental plants. One group of the plants was irrigated with Hoagland solution composed of various Al concentrations of 0 to 1,000 ppm containing 50 ppm Ca, and the other group was irrigated with Hoagland solution composed of various Ca concentrations of 0 to 1,000 ppm containing 100 ppm Al for a month during June and July.
By Al-surplus over 100 ppm, the margins of buckwheat leaves were curled down and turned into yellow-brown necrosis similar to Ca-deficiency, and the old kidneybean leaves showed marginal and veinal chlorosis in addition to the early shedding of leaves. With Al-surplus of 100 ppm the content of chloropyⅡ a and b in both plants was decreased by 30∼40%. The ratio 3/1 of chlorophyⅡ a/b was not alterad by Al-surplus and Ca-deficiency at an early stage, but it was affected markedly at a final stage of growth. Leaf respiration with 100 ppm Al containing 50 ppm Ca was slightly affected in buckwheat, but decreased by 20% in kidneybean. With Al-surplus of 100 ppm the ATP content was decreased by 32% in the kidneybean leaves and by 80% in buckwheat leaves, whereas with Ca-deficiency it was decreased by 72% in kidneybean and by 90% in buckwheat. the rhythm of ATP level showed self-relience without being affected by light or temperature under the green house condition although by Al-s rplus and Ca-deficiency the ATP level of the rhythm was lower than that of control.
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