Department of Botany and Plant Pathology, Colorado State University, 80521, Fort. Collins, Colorado, USA.
Planta. 1974 Dec;117(4):361-5. doi: 10.1007/BF00388031.
Photodormant lettuce (Lactuca sativa L.) seeds were incubated in mannitol to prevent germination. Under these conditions, red light induced an extensive degradation of protein and a moderate one of lipid in the cortical cells of the radicle 24 h after treatment. It is suggested that the previously reported phytochrome-caused lowering of the water potential in light-treated embryos, which enables these embryos to overcome the resistance of the surrounding layers of the seed, is caused by lowering of the osmotic potential due to degradation of storage compounds in the radicle.
光休眠生菜（Lactuca sativa L.）种子在甘露醇中孵育以防止发芽。在这些条件下，红光在处理后 24 小时诱导根皮质细胞中蛋白质的广泛降解和脂质的适度降解。据推测，先前报道的光敏色素引起的光照处理胚胎水势降低，使这些胚胎能够克服种子周围层的阻力，是由于根中储存化合物的降解导致渗透势降低所致。
