Puritch G S, Barker A V
Department of Plant and Soil Sciences, University of Massachusetts, Amherst, Massachusetts.
Plant Physiol. 1967 Sep;42(9):1229-38. doi: 10.1104/pp.42.9.1229.
Ammonium toxicity resulted in morphological modifications of tomato leaf chloroplasts. The chloroplasts, which are normally flattened around the protoplast periphery, became ellipsoidally rounded and dispersed through the protoplasm. The first apparent effect of plastid degradation was development of many vesicles from the fretwork. Later the grana lamellae swelled, and some disappeared. Eventually, distinct grana could not be detected.Ammonium accumulation, chlorophyll loss, and photosynthetic decrease occurred simultaneously. Initial changes in these processes preceded the detection of modifications of fine structure; however, each continued with further breakdown of the chloroplasts.
铵毒性导致番茄叶片叶绿体形态发生改变。叶绿体通常围绕原生质体周边呈扁平状，变得椭圆且在原生质中分散开来。质体降解的首个明显效应是从网格状结构产生许多小泡。随后基粒片层肿胀，一些消失。最终，无法检测到明显的基粒。铵积累、叶绿素损失和光合作用下降同时发生。这些过程的初始变化先于细微结构改变的检测；然而，随着叶绿体的进一步解体，每个过程都持续进行。
