Self-limitation of herbicide mobility by phytotoxic action.

摘要: Translocation of phloem-mobile herbicides was inhibited by their phytotoxic action on processes that maintain assimilate translocation. Glyphosate lowered import into developing sink leaves soon after it applied to exporting sugarbeet leaves. Later, photosynthe- sis slowed down and starch accumulation stopped, but export both glyphosate continued until limited availability at night. Experiments with field pennycress Tartary buckwheat indicated self-limitation chlorsulfuron translocation proba- bly occurred resulted from entry phloem rather than inhibition photosynthesis or carbon allocation. Leakage chlorsul- furon the when also may have contributed its reduced Nomenclature: Chlorsulfuron, 2-chloro-N-(((4-methoxy- 6-methyl - 1,3,5 triazin 2 yl)amino)carbonyl)ben- zenesulfonamide; glyphosate, N-(phosphonomethyl)gly- cine; pennycress, Thlaspi arvense L. #3 THLAR; sugarbeet, Beta vulgaris L.; buckwheat, Fagopyrum tataricum (L.) Gaertn. # FAGTA. Additional index words. Photosynthesis, organic transloca- tion, starch.