Studies on Tissue of Endosperm and Developmental Process in Opaque Kernel

[摘要] In this studies we observed on opaque kernel, especially green opaque kernels. The results are summarized as follows: 1) Opaque kernels are classiffied in several types according to its shapesas green opaque kernel (type 6, type 7-1, type 7-2, ), white opaque kernel, small translucent green kernel, and monstrous kernel. Tissue and outlook of green opaque kernel are shown in Figure 1 to Figure 12. Type 6 and type 7 showing green opaque kernel, have immature parts (starch-less tissue) in endosperm as in Figure 4, 6, 8, 10, 12. 2) Developmental process of kernels are classified into 6 types showing in Table 1. According to Table 1, early growth of opaque kernels are suppressed by the competition of superior kernels. And in the late ripening stage at 17 days after flowering, opaque kernels grow comparatively rapid. 3) From the incressing curve of 1000 kernels weight of inferior spikelet, we observed the competition of growth of kernel among inferior spikelet and superior spikelet as in Figure 9. 4) Protein content of opaque kernels are always richer than ripened kernels. 5) If we could promote growth of opaque kernel in late stage of ripening, some of these might be grown to ripennd kernel in harvesting time, then we consider that above results show its possibility.

[学科分类] 农业科学（综合）