THE ACIDITY OF THE JUICE OF DESMARESTIA
THE ACIDITY OF THE JUICE OF DESMARESTIA
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Desmarestia 果汁的酸度
DOI：
10.1002/j.1537-2197.1937.tb09067.x
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发表时间：
1937
期刊：
影响因子：
--
通讯作者：
G. Rigg
中科院分区：
文献类型：
--
作者：
H. Wirth;G. Rigg
这些植物汁液的酸度数据如何与植物的新陈代谢及其与环境的关系相关联？Crozier（1919）的工作表明，氢离子在Desmarestia中的积累不是孤立的情况。在海藻中。他发现瓦罗尼亚的细胞汁液（pH 5.0 - 6.7）比植物生存的海水（8.07 - 8.2）酸性更强，随着细胞接近死亡，pH值逐渐增加，达到7.0或8.0。众所周知，有些水生植物会积累某些离子（例如，K，Br和I）的浓度比它们在浴介质中存在的浓度高得多，并且证据被认为是"强调代谢过程的重要性，这是植物细胞积累矿物元素所不可或缺的"，并表明"目前应该优先考虑某种类型的离子渗透理论"。（霍格兰，1930年）。已经建立了显示非生命系统中这种积累的模型（Osterhout和Stanley，1932年）。在此基础上，氢离子在Desmarestia中的积累是否合理？这似乎是一个有希望的思路和调查。高酸度是众所周知的发生在许多陆地植物。一个极端的例子是秋海棠。Smith和Quirk（1926）发现这种植物叶子的pH值为0.9至1.36。我们的研究结果表明，pH值有点相同的顺序Desmarestia。结果表明，秋海棠的酸度从叶到根逐渐降低，这可能与高酸度和代谢过程的活性有关。多汁陆地植物的高酸度与呼吸作用有关;它们汁液的酸度在黑暗中上升，在光照下福尔斯下降。然而，在陆地植物中，参与这一过程的酸是有机的，似乎很难使亲有机酸合理化。
How may the data on the acidity of the juice of these plants be correlated with the metabolism of the plants and their relation to the environment? The work of Crozier (1919) indicates that the accumulation of hydrogen ions in Desmarestia is not an isolated case. among marine algae. He found that the cell sap of Valonia (pH 5.0-6.7) was much more acid than the sea water (8.07-8.2) in which the plants were living, and that the pH gradually increased as the cells approached death, reaching 7.0 or 8.0. It is well known that some aquatic plants accumulat^ certain ions (eg, K, Br, and I) in much greater concentration than they exist in the bathing medium, and the evidence is believed to" emphasize the importance of metabolic processes as indispensable to the accumulation of mineral elements by plant cells," and to indicate" that at present preference should be given to some-type of ionic theory of penetration"(Hoagland, 1930). Models showing such accumulation in non-living systems have been set up (Osterhout and Stanley, 1932). Can the accumulation of hydrogen ions in Desmarestia be rationalized on this basis? It would seem that this is a hopeful line for thought and investigation.High acidity is known to occur in many land plants. An extreme case is found in Begonia lucerna. Smith and Quirk (1926) found the pH of the leaves of this plant to be 0.9 to 1.36. Our results indicate a pH of somewhat the same order for Desmarestia. It was found that the acidity of Begonia decreased from leaves to roots; this may suggest a relation between high acidity and the activity of the processes of metabolism. High acidity in succulent land plants is connected with respiration; the acidity of their juices rises in darkness and falls in light. The acids involved in this process in land plants, however, are organic, and it seems difficult to rationalize the pro-