A histological, cytochemical, and ultrastructural investigation of seeds of control (nonshedding) and shedding fruits of Malus domestica Borkh. showed differences in the pattern of nutrient distribution. The kind and amount of storage compounds in the two seeds also differed. Protein bodies and starch were abundant in the control seeds and nearly absent in the seeds of shedding fruit. In the latter, there was a great abundance of phenols that exhibited a specific distribution in different tissues of the chalazal region. A cuticle was present on the inner side of the inner integument of the seeds of both control and shedding fruits. This cuticle was interrupted in the chalaza and formed a pathway for nutrient translocation, what we termed the “window.” Cell wall changes observed in the chalazal window were probably associated with the different distribution pattern of storage compounds and with the control of nutrient routing. The delayed and variable development of the embryos of seeds in shed fruits may be related to both the altered pattern of storage substances and their translocation to the embryo.

中文翻译：

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MalusdomesticaBorkh的细胞组织化学分析。来自脱落和不脱落果实的种子

控制种子（不脱落）和脱落果实的 Malusdomestica Borkh 的组织学、细胞化学和超微结构研究。显示养分分布模式的差异。两种种子中储存化合物的种类和数量也不同。蛋白质体和淀粉在对照种子中含量丰富，而在脱落果实的种子中几乎不存在。在后者中，有大量的酚类在合点区域的不同组织中表现出特定的分布。在对照和脱落果实的种子的内珠被的内侧存在角质层。这个角质层在系带中被打断，形成了一条营养转运的途径，我们称之为“窗口”。在合点窗口中观察到的细胞壁变化可能与储存化合物的不同分布模式和养分路径的控制有关。脱落果实中种子胚胎的延迟和可变发育可能与储存物质的改变模式及其向胚胎的易位有关。