Restoration of Organic Acid Accumulation in Sectioned Leaves of Bryophyllum tubiflorum Harv.
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چکیده
منابع مشابه
Restoration of Organic Acid Accumulation in Sectioned Leaves of Bryophyllum tubiflorum Harv.
When leaves of Bryophyllum tubiflorum were cut into transverse sections, and held at 20 C in the dark, the capacity to accumulate organic acid decreased with decreasing section thickness. In addition, the rate of respiration increased with decreasing section thickness and was unaffected by changes in O(2) concentration above 5% or by the presence (1%) of CO(2). It was concluded that O(2) ventil...
متن کاملWounding Stimulates Cyanide-sensitive Respiration in the Highly Cyanide-resistant Leaves of Bryophyllum tubiflorum Harv.
The rate of respiration in sectioned leaves of Bryophyllum tubiflorum Harv. increases with decreasing section thickness. The rates of uninhibited respiration in 2- and 8-millimeter-thick sections are 74 and 46 microliters of O(2) per gram fresh weight of unruptured tissue per hour at 20 C, whereas the rate in the presence of cyanide is 31 microliters of O(2) in each case. The rates are unaffect...
متن کاملThe Organic Acids of the Leaves of Bryophyllum Calycinum
It has been known since the work of Mayer (1) in 1875 that the thick succulent leaves of many plants of the family Crassulaceae become enriched in titratable organic acids during the night and diminish in acid content when the leaves are illuminated. An analogous diurnal variation in acidity has been observed in a number of other succulents, and occasionally in species of different growth habit...
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15 صفحه اولThe behavior of the organic acids and starch of Bryophyllum leaves during culture in continuous light.
When leaves of’ Bryophyllum calycinum are picked at daybreak and cultured in water in darkness, certain changes in composition occur that are not observed in such leaves when they are exposed to the normal diurnal alternation of light and darkness. In effect the leaves are exposed t’o a night period of abnormal length and the stresses that are thus set up give rise to reactions the ultimate phy...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1975
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.56.6.830