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- Title
Effects of applied glyphosate on shikimate and chlorophyll contents in 3-weed species Eleusine indica (L.) Gaertn., Echinochloa crus-galli (L.) P. Beauv. and Amaranthus retroflexus L.
- Authors
Jingchao Chen; Ying Zheng; Minggang Zhang; Xiangju Li
- Abstract
In field study we determined the effects of applied glyphosate on the dynamics of shikimate accumulation and chlorophyll content at different growth stages in 3-test weeds Eleusine indica (L.) Gaertn., Echinochloa crus-galli (L.) P. Beauv. and Amaranthus retroflexus L. The applied glyphosate increased the shikimate content in dose dependent manner. All 3-test weed species showed the highest accumulation of shikimate in early growth stage, when glyphosate was applied at 820 g ae ha-1 and 1640 g ae ha-1. The highest shikimate accumulation in plants of Eleusine indica (L.) Gaertn., Echinochloa crus-galli (L.) P. Beauv. and Amaranthus retroflexus L. was 2528.6 μg g-1, 2366.0 μg g-1, and 8236.1 μg g-1, respectively. The leaf single-photon avalanche diode (SPAD) values of 3-test weeds 7 days after treatment (DAT) were inversely correlated to the glyphosate dose. The highest leaf SPAD values were recorded in Eleusine indica (L.) Gaertn. plants at latter growth stage and in Amaranthus retroflexus L. plants in early growth, with glyphosate at 820 g ae ha-1 and 1640 g ae ha-1. Echinochloa crus-galli (L.) P. Beauv. and Amaranthus retroflexus L. were subjected to logistic model using the shikimate and relative chlorophyll contents, respectively. This study can be used to test the glyphosate response in resistant weeds and to detect their weed sensitivity to applied glyphosate in field conditions.
- Subjects
GLYPHOSATE; ECHINOCHLOA; HERBICIDE resistance; AMARANTHS; WEEDS; CHLOROPHYLL; AVALANCHE diodes; PLANT growth
- Publication
Allelopathy Journal, 2023, Vol 59, Issue 1, p95
- ISSN
0971-4693
- Publication type
Article
- DOI
10.26651/allelo.j/2023-59-1-1434