Relative Fitness of Acetyl-CoA Carboxylase susceptible and resistant Alopecurus myosuroides biotypes: germinability and seedling pre-emergence growth under salinity and drought stress conditions

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Ghazali Zahra; Keshtkar Eshagh; AGHA ALIKHANI MAJID; Kudsk Per

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Journal: IRANIAN JOURNAL OF WEED SCIENCE Year:2020 | Volume:16 | Issue:1 Page(s): 49-61

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Title

Relative Fitness of Acetyl-CoA Carboxylase susceptible and resistant Alopecurus myosuroides biotypes: germinability and seedling pre-emergence growth under salinity and drought stress conditions

Author(s)

Ghazali Zahra | Keshtkar Eshagh | AGHA ALIKHANI MAJID | Kudsk Per | Issue Writer Certificate

Keywords

Fitness costQ2

herbicide resistanceQ2

root lengthQ2

shoot lengthQ1

Abstract

Fitness costs of herbicide resistance may be more evident and increase under stress environmental conditions. To test this hypothesis, a herbicide-resistant (R) and a herbicide-susceptible (S) phenotype with controlled and homogenized genetic background were isolated within a non– target-site resistant (NTSR) black-grass population. Accumulated maximum germination (Gmax) and time to reach the Gmax (G50) of biotypes were examined under non-stress and abiotic-stress conditions (salinity at 16 dSm-1, drought at-0. 8 Mpa). In addition, seedling pre-emergence biotypes growths were evaluated under nonstress condition. There was no difference in Gmax between the R and S biotypes, whereas the Gmax of R phenotype was 28% and 49% lower than that of the S phenotype under salinity-and drought-stress conditions, respectively. The R phenotype germinated around seven to 16 hours later than the S phenotype under all non-stress and abiotic-stress conditions, i. e. the R phenotype had higher G50 than the other phenotype. The experiments of seedling pre-emergence growth showed that the R and S biotypes had similar root and shoot length under non-stress condition. The results clearly showed that the germinability Fitness costs of NTSR black-grass increase when the plants are grown under salinity and drought stress conditions.

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APA: Copy

Ghazali, Zahra, Keshtkar, Eshagh, AGHA ALIKHANI, MAJID, & Kudsk, Per. (2020). Relative Fitness of Acetyl-CoA Carboxylase susceptible and resistant Alopecurus myosuroides biotypes: germinability and seedling pre-emergence growth under salinity and drought stress conditions. IRANIAN JOURNAL OF WEED SCIENCE, 16(1 ), 49-61. SID. https://sid.ir/paper/404910/en

Vancouver: Copy

Ghazali Zahra, Keshtkar Eshagh, AGHA ALIKHANI MAJID, Kudsk Per. Relative Fitness of Acetyl-CoA Carboxylase susceptible and resistant Alopecurus myosuroides biotypes: germinability and seedling pre-emergence growth under salinity and drought stress conditions. IRANIAN JOURNAL OF WEED SCIENCE[Internet]. 2020;16(1 ):49-61. Available from: https://sid.ir/paper/404910/en

IEEE: Copy

Zahra Ghazali, Eshagh Keshtkar, MAJID AGHA ALIKHANI, and Per Kudsk, “Relative Fitness of Acetyl-CoA Carboxylase susceptible and resistant Alopecurus myosuroides biotypes: germinability and seedling pre-emergence growth under salinity and drought stress conditions,” IRANIAN JOURNAL OF WEED SCIENCE, vol. 16, no. 1 , pp. 49–61, 2020, [Online]. Available: https://sid.ir/paper/404910/en

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