TY - JOUR
AU1 - Upadhyaya, Mahesh, K.
AU2 - Hsiao, Andrew, I.
AU3 - Bonsor, Mark, E.
AB - Abstract The germination and endosperm-mobilization responses of two genetically pure lines (AN-51 and Mont 73) of Avenafatua (wild oat) to gibberellic acid (GA3) and three substituted phthalimides (experimental compounds AC-92,803, AC-94,377 and AC-99,524) were studied. The line AN-51 showed a much greater response to GA3, in terms of the percentage and the rate of stimulation of germination, than Mont 73. These lines also differed significantly in their response to AC-94,377 and AC-99,524. The relative germination response of the two lines to these phthalimides was very similar to that for GA3. The phthalimide AC-94,377 was more effective at stimulating germination than AC-99,524, whereas AC-92,803 had little or no effect. Salicylhydroxamate, an inhibitor of alternative respiration, did not inhibit the AC-94,377-induced germination. Like GA3, AC-94,377 induced α-amylase production and the release ofreducing sugars by 3 mm endosperm segments. GA3 was most effective at inducing endosperm mobilization, followed by AC-94,377, AC-99,524 and AC-92,803, respectively. The line AN-51 showed a significantly greater response to both AC-94,377 and GA3 than Mont 73. It is concluded that: (1) genetically pure lines of wild oats differ in their response to substituted phthalimides - the line AN-51 being more responsive than Mont 73, (2) the phthalimide AC-94,377 is the most effective at inducing germination and AC-92,803 the least, (3) like GA3, phthalimides induce endosperm mobilization and pure lines differ in the degree of this response, and (4) salicylhydroxamate-sensitive respiration is not necessary for the stimulation of germination by AC-94-377. The similarities in the effects of AC-94,377 and GA2 (two structurally dissimilar compounds), and in the relative response of the two lines to these chemicals may provide a useful system for the investigation of wild oat seed physiology. The differential susceptibility of pure lines to phthalimides also indicates that use of these compounds to deplete wild oat seed banks may increase the proportion of less responsive biotype(s) in field populations. Wild oats, weed seed bank, dormancy, germination, endosperm mobilization, αamylase, Avena fatua, phthalimides, gibberellic acid This content is only available as a PDF. © 1986 Annals of Botany Company
TI - Differential Response of Pure Lines of Avena fatua L. to Substituted Phthalimides: Germination and Endosperm-mobilization Studies
JF - Annals of Botany
DO - 10.1093/annbot/58.4.455
DA - 1986-10-01
UR - https://www.deepdyve.com/lp/oxford-university-press/differential-response-of-pure-lines-of-avena-fatua-l-to-substituted-2CTZBf1253
SP - 455
EP - 463
VL - 58
IS - 4
DP - DeepDyve
ER -