花生双受精过程及其经历时间

史春艳, 申家恒^*, 李伟

Double Fertilization and Duration of Phases in Peanut (Arachis hgpogaeaL.)

SHI Chun-Yan, SHEN Jia-Heng^*, LI Wei

图版I 1: 花粉粒落在柱头上; 2: 成熟花粉, 箭头示生殖细胞和营养核; 3: 箭头示放大的成熟花粉营养核; 4: 花粉萌发, 长出花粉管#cod#x000d7;800; 5: 生殖细胞进入花粉管, 在花粉管中向子房移动; 6: 生殖细胞分裂中期, 染色体清晰可见; 7: 分裂后期, 染色体平均分配; 8: 分裂末期, 形成2个子细胞; 9: 进入子房腔的2个精子; 10: 成熟的卵细胞形态; 11: 没有退化的2个助细胞; 12: 退化的助细胞, 染色较深; 13: 上下排列的2个极核; 14: 左右排列的2个极核; 15: 卵细胞, 次生核; 16: 精子在一个助细胞中释放; 17: 精核在卵细胞周围。Bar=100 #cod#x003bc;m
Plate I Plate I 1: pollen grains on the stigma; 2: mature pollen, generative cell GC and vegetative nucleus VN shown by arrow; 3: amplified vegetative nucleus of mature pollen arrow; 4: pollen germination #cod#x000d7;800, stretching from the pollen tube PT; 5: generative cell coming into pollen tube and moving to the ovary in the pollen tube; 6: reproductive cell in mitosis metaphase MM, pollen is clearly visible; 7: mitosis anaphase MA, chromosome evenly distributed; 8: mitosis telophase MT forming two cells; 9: two sperms coming into ovary cavity; 10: egg cellEC shape; 11: two synergids SY; 12: degenerated synergid DSY; 13: two polar nucleus PN lined up and down; 14: two polar nucleus lined right and left; 15: egg cell, secondary nuclear; 16: sperms SP released; 17: sperm nucleus SN near the egg cell. Bar=100 #cod#x003bc;m