Relationship between development of endosperm transfer cells and grain mass in maize
Relationship between development of endosperm transfer cells and grain mass in maize
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DOI：
10.1023/a:1001840316163
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发表时间：
1998-01-01
影响因子：
1.5
通讯作者：
Hu, C
中科院分区：
文献类型：
--
作者：
Gao, R;Dong, S;Hu, C
玉米（Zea mays L.）授粉后10天开始分化为传递细胞。在10和15 DAP期间，转移细胞壁增厚和向内生长缓慢。细胞质内有较多的小泡、丝状物和线团状物，线粒体和粗面内质网增多。15天后，细胞壁增厚和向内生长的速度加快.到20 DAP时，细胞转移带已发育，细胞宽65 ~ 70行，深3 ~ 4层，细胞壁明显向内生长，与过碘酸希夫氏试剂呈强阳性反应。20 DAP后，传递细胞形态结构无明显变化，进入功能期。成熟籽粒（53 DAP）中，大多数基部传递细胞充满向内生长的细胞，但这些细胞中也有致密的细胞质。这些细胞的细胞核形状不规则。一些转移细胞含有黑色颗粒和晶体。在果皮组织中靠近传递细胞区形成的黑色层。胚乳传递细胞的充分发育对减少籽粒败育、增加籽粒质量具有重要意义。
The most basal endosperm cells of maize (Zea mays L.) began differentiating into transfer cells in 10 days after pollination (DAP). The thickening and ingrowths forming in the transfer cell wall were slow during 10 and 15 DAP. There were many vesicles, silky and string ball objects in cytoplasm, and the number of mitochondria and rough endoplasm reticulum increased. After 15 DAP, the wall thickening and ingrowths forming in the transfer cells sped up. By 20 DAP, the transfer cell zone had developed, there appeared 65 - 70 rows of cells in width and 3 - 4 layers of cell in depth, the obvious cell wall ingrowths presented strong positive reaction with periodic acid Schiffs reagent. After 20 DAP, no significant change appeared in the shape and structure of the transfer cells, and the transfer cells entered function stage. In the mature kernels (53 DAP), the most basal transfer cells were filled with ingrowths, however, dense cytoplasm was also found in these cells. The nuclei had quite irregular shapes in these cells. Some transfer cells contained black grains and crystals. A black layer formed in the pericarp tissue adjacent to the transfer cell zone. Full development of endosperm transfer cells was important for reduction of kernel abortion and increase of kernel mass.