| 摘要 |
The present invention is directed to methods for enhancing root growth comprising applying a S-Benzylthiouracil compound, or a salt thereof, to a plant, plant propagation material, root zone, or root of a plant. The invention also relates to methods for reducing the harmful effects of environmentally stressful conditions on plants, such as drought, or intense temperatures, by application of a S-Benzylthiouracil compound, or a salt thereof, to a plant, plant propagation material, root zone, or root of a plant. The invention further relates to new S-Benzylthiouracil derivatives, and salts thereof. |
| 主权项 |
1. A method of enhancing monocotyledonous plant growth comprising applying to a plant, plant propagation material, root zone, or root of a monocotyledonous plant one or more compounds selected from the group consisting of S-Benzylthiouracil compounds of Formula I: wherein X is OH, NH2, or H; Y is S or O; Z1, Z2, and Z3 are each carbon or N, but at least two of Z1, Z2, and Z3 are N; L is —CH2—, —CH2CH2—, or —CH═CHCH2—; R3 is H, lower alkyl, or OH; and n is 0, 1, or 2; wherein when n is 1, R1 is H, halogen, lower alkyl, or lower alkoxy in the 2-, 3- or 4-position; and when n is 2, each R1 is independently halogen, lower alkyl or lower alkoxy; R2 is H, lower alkyl, —COO-lower alkyl, taken together with R3 constitutes a —N═CH—NH— bridge forming a ring, or is absent when Z2 is N; and wherein Z2 is carbon when R2 is H, lower alkyl or —COO-lower alkyl and when R2 and R3 form a —N═CH—NH— bridge; or a salt thereof. |
