Department of Agronomy and Range Science, University of California, Davis, California 95616.
Plant Physiol. 1978 Dec;62(6):851-5. doi: 10.1104/pp.62.6.851.
Uptake of sucrose and hexoses by hypocotyl segments of cotton (Gossypium hirsutum L.) was shown to be dependent upon sugar level in the tissue. The effect was not related to total sugar level inasmuch as a portion of previously accumulated sugar was without influence on uptake. That portion was presumed to be compartmentalized, most likely in vacuoles. Growth regulators modified the uptake pattern apparently through alterations in secondary metabolism. Uptake and incorporation were inhibited by rotenone and stimulated by light. The light effect was blocked by 3-(3,4-dichlorophenyl)-1,1-dimethylurea. A general model was presented for assimilate flux within sink tissues with free space as the conduit from phloem to carrier site.
棉属（Gossypium hirsutum L.）下胚轴切段对蔗糖和己糖的吸收依赖于组织中的糖含量。这种影响与总糖含量无关，因为以前积累的一部分糖对吸收没有影响。这部分糖可能被区室化，很可能在液泡中。生长调节剂显然通过改变次生代谢来改变吸收模式。呼吸抑制剂鱼藤酮抑制吸收和掺入，光刺激吸收和掺入。该光效应被 3-(3,4-二氯苯基)-1,1-二甲基脲所阻断。提出了一个用于汇组织中同化物通量的一般模型，自由空间作为韧皮部到载体部位的通道。
