Department of Botany and Plant Pathology, Colorado State University, Fort Collins, Colorado 80523.
Plant Physiol. 1977 Oct;60(4):567-9. doi: 10.1104/pp.60.4.567.
Squash (Cucurbita pepo L. var. melopepo torticalis, Bailey) leaves were supplied with (14)C-sucrose, then specific radioactivities of the glucose and galactose moieties of translocated stachyose were determined. In every case, the specific radioactivity of the galactose moiety was greater than that of the glucose moiety. It is concluded that the stachyose was not synthesized at either the phloem-loading site or subsequent to phloem loading, but rather in cells that were not a part of the translocation system, possibly the mesophyll cells.
南瓜(Cucurbita pepo L. var. melopepo torticalis,Bailey)叶片被供应 14C-蔗糖,然后测定转移棉子糖中葡萄糖和半乳糖部分的比放射性。在每种情况下,半乳糖部分的比放射性都大于葡萄糖部分。因此,可以得出结论,棉子糖不是在韧皮部装载部位或韧皮部装载之后合成的,而是在不属于转运系统的细胞中合成的,可能是叶肉细胞。