Rw. Wallace et Rr. Bellinder, GLYPHOSATE ABSORPTION AND TRANSLOCATION IN RUST-INFECTED QUACKGRASS (ELYTRIGIA REPENS), Weed science, 43(1), 1995, pp. 1-6
Puccinia coronata infection increased absorption of C-14-glyphosate in
quackgrass 3 days after inoculation (DAI) when compared to 0, 6, 9, o
r 12 DAI, Days after inoculation had no effect on glyphosate transloca
tion out of treated leaves until 9 to 12 DAI when 89% of the absorbed
C-14-glyphosate was retained within the infected leaf, In contrast, on
ly 43% was retained in leaves treated at 0 DAI, In other studies, C-14
-glyphosate absorption increased linearly from 21 to 35% 12 to 96 h af
ter treatment (HAT). Differences between control and rust-infected pla
nts were not significant, Sixty-three percent of absorbed C-14-glyphos
ate translocated out of control leaves by 96 HAT, while only 10% trans
located out of rust-infected leaves, Additionally, 28 and 4% of the C-
14 absorbed was recovered from the rhizomes of control and rust-infect
ed plants, respectively.