Ultrastructural changes occurred in the chloroplasts in the yellow part including grana lamellae and grana decreasing and significant a ccumulation of starch grains and osmiophilic globules.

• 结果表明，在一定 条件下，叶片的失绿、复绿与叶绿素含量的下降、上升变化趋势一致；叶绿体结构在失绿区 表现为严重退化，基粒和基粒片层减少，淀粉粒和嗜锇粒增多；