Effect of water deficit stress on benzoylprop-ethyl performance and physiological traits of winter wild oat (Avena sterilis subsp. ludoviciana)
Research output: Contribution to journal › Journal article › Research › peer-review
Standard
Effect of water deficit stress on benzoylprop-ethyl performance and physiological traits of winter wild oat (Avena sterilis subsp. ludoviciana). / Alizade, Saeid; Keshtkar, Eshagh; Mokhtasi-Bidgoli, Ali; Sasanfar, Hamidreza; Streibig, Jens C.
In: Crop Protection, Vol. 137, 105292, 2020.Research output: Contribution to journal › Journal article › Research › peer-review
Harvard
APA
Vancouver
Author
Bibtex
}
RIS
TY - JOUR
T1 - Effect of water deficit stress on benzoylprop-ethyl performance and physiological traits of winter wild oat (Avena sterilis subsp. ludoviciana)
AU - Alizade, Saeid
AU - Keshtkar, Eshagh
AU - Mokhtasi-Bidgoli, Ali
AU - Sasanfar, Hamidreza
AU - Streibig, Jens C.
PY - 2020
Y1 - 2020
N2 - Increasing the diversity in the sites of action of herbicides is an important method for delaying and preventing herbicide resistance in weed populations. Benzoylprop-ethyl, a lipid biosynthesis inhibitor, is used to increase the diversity of herbicide sites of action and control ACCase- and ALS-resistant Avena sterilis subsp. ludoviciana (Durieu.) Gillet & Magne) populations in Iran. Drought stress, especially in arid and semiarid areas, affects weed physiology and performance of herbicides. Accordingly, a series of dose-response assays was conducted to evaluate the efficacy of benzoylprop-ethyl under drought-(60% Field Capacity) and non-drought-stress (90% Field Capacity) conditions on A. sterilis subsp. ludoviciana. Also, some biochemical and physiological traits of A. sterilis subsp. ludoviciana including leaf chlorophyll content, leaf greenness index, photosynthesis rate and stomatal conductance were investigated under the drought and non-drought regimes. The efficacy of benzoylpmp-ethyl decreased significantly under drought condition. The effective dose reducing dry weight by 90% in relation to the untreated control (i.e., ED90) for the drought-stressed plants was significantly (P <0.01) higher than that of the non-drought-stressed plants, where it was 895 (+/- 112.6) and 1543 (+/- 205.3) g a.i. ha(-1), respectively. The drought index (the ratio of the ED90 at 60% FC relative to ED(90 )at 90% FC) was 1.68 (+/- 0.16) and thus, significantly higher than 1. Leaf chlorophyll content (chl a and chl b) and leaf greenness index increased under drought conditions, while the photosynthesis rate, stomatal conductance, and the chl a/b decreased. The efficacy reduction of benzoylpmp-ethyl on drought-stressed plants might be due to photosynthesis reduction and reduced stomatal conductance leading to reduced herbicide uptake. Tracking local weather forecasts, monitoring water soil content and irrigating the field before herbicide application were suggested to overcome the detrimental effect of drought stress on the efficacy of benzoylprop-ethyl. Potential tactics such as using adjuvants, different formulations and early application timing of benzoylprop-ethyl to tackle the problem were proposed for future studies.
AB - Increasing the diversity in the sites of action of herbicides is an important method for delaying and preventing herbicide resistance in weed populations. Benzoylprop-ethyl, a lipid biosynthesis inhibitor, is used to increase the diversity of herbicide sites of action and control ACCase- and ALS-resistant Avena sterilis subsp. ludoviciana (Durieu.) Gillet & Magne) populations in Iran. Drought stress, especially in arid and semiarid areas, affects weed physiology and performance of herbicides. Accordingly, a series of dose-response assays was conducted to evaluate the efficacy of benzoylprop-ethyl under drought-(60% Field Capacity) and non-drought-stress (90% Field Capacity) conditions on A. sterilis subsp. ludoviciana. Also, some biochemical and physiological traits of A. sterilis subsp. ludoviciana including leaf chlorophyll content, leaf greenness index, photosynthesis rate and stomatal conductance were investigated under the drought and non-drought regimes. The efficacy of benzoylpmp-ethyl decreased significantly under drought condition. The effective dose reducing dry weight by 90% in relation to the untreated control (i.e., ED90) for the drought-stressed plants was significantly (P <0.01) higher than that of the non-drought-stressed plants, where it was 895 (+/- 112.6) and 1543 (+/- 205.3) g a.i. ha(-1), respectively. The drought index (the ratio of the ED90 at 60% FC relative to ED(90 )at 90% FC) was 1.68 (+/- 0.16) and thus, significantly higher than 1. Leaf chlorophyll content (chl a and chl b) and leaf greenness index increased under drought conditions, while the photosynthesis rate, stomatal conductance, and the chl a/b decreased. The efficacy reduction of benzoylpmp-ethyl on drought-stressed plants might be due to photosynthesis reduction and reduced stomatal conductance leading to reduced herbicide uptake. Tracking local weather forecasts, monitoring water soil content and irrigating the field before herbicide application were suggested to overcome the detrimental effect of drought stress on the efficacy of benzoylprop-ethyl. Potential tactics such as using adjuvants, different formulations and early application timing of benzoylprop-ethyl to tackle the problem were proposed for future studies.
KW - Herbicide efficacy
KW - Drought index
KW - Stomatal conductance
KW - Chlorophyll content
KW - Photosynthesis rate
KW - Winter wild oat
KW - Sterile oat
KW - CHLOROPHYLL FLUORESCENCE
KW - PHOTOSYNTHESIS
KW - DROUGHT
KW - PHYTOTOXICITY
KW - GLYPHOSATE
KW - EFFICACY
KW - GROWTH
KW - CO2
U2 - 10.1016/j.cropro.2020.105292
DO - 10.1016/j.cropro.2020.105292
M3 - Journal article
VL - 137
JO - Crop Protection
JF - Crop Protection
SN - 0261-2194
M1 - 105292
ER -
ID: 249484117