Assessment of the xenobiotic effects of 2,4-dichlorophenoxyacetic acid + 2-methyl-4-chlorophenoxyacetic acid and bromoxynil + 2-methyl-4-chlorophenoxyacetic acid herbicides in wheat

IF 2.4 4区 生物学 Q2 PLANT SCIENCES
Sommayeh Abbasyan, Seyedali Peyghambari, Mohhamad-Reza Bihamta, Reza Maali-Amiri, Hassan Alizade
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Abstract

Herbicides are xenobiotic compounds. To investigate the xenobiotic effects of foliar herbicide consumption and plant response over time, two commercial selective herbicides (bromoxynil + 2,4-D (H1), 2,4-D + 2-MCPA (H2), and the control (zero, H0)) were applied to seven Iranian wheat genotypes at 50% tillering. The biochemical traits were measured at six-time intervals (0–30th days after treatment). Morphological traits were measured on the 30th day after treatment. The results showed that the applied treatments significantly affected all the measured traits (P < 0.001). Therefore, these traits can be considered screening responses to xenobiotic stress caused by herbicides. For the first time, qualitative Bendict’s reagent quantification and estimation of the proximate content of sucrose as well as the 3,5-dinitrosalicylic acid reagent showed significant variation among genotypes. The change in the treated sample compared to H0 showed that the effects of stress started at least 30 min after treatment. Consequently, the tolerant plants recovered on the 30th day after treatment. Clustering of the 20 measured traits showed that height, specific leaf weight, and chlorophyll a content could be selected as indicator traits for genotype screening. The genotypes were classified into three groups (sensitive, semi-sensitive, and tolerant) based on indicator traits. The maximum H2O2 concentration (a biochemical indicator of the occurrence of stress) was 980.5 µg at 30 min after treatment with H2 and 735.1 µg on 1th day after treatment with H1. Finally, the genotypes showed greater sensitivity to the combination herbicide from two biochemical groups of the same type (H2) than did those from different groups (H1).

2,4-二氯苯氧乙酸+ 2-甲基-4-氯苯氧乙酸和溴苯腈+ 2-甲基-4-氯苯氧乙酸除草剂对小麦的异种生物效应评价
除草剂是一种异种化合物。为了研究叶面除草剂用量的外源效应和植物的长期反应,在分蘖率为50%时,对7个伊朗小麦基因型施用两种商业选择性除草剂(溴苯醚+ 2,4- d (H1)、2,4- d + 2- mcpa (H2)和对照(0,H0)。每隔6次(处理后0 ~ 30天)测定生化性状。在处理后第30天测定形态性状。结果表明,施用处理显著影响了所有测量性状(P < 0.001)。因此,这些性状可以被认为是筛选对除草剂引起的外源胁迫的反应。首次采用Bendict试剂对蔗糖近似值的定性定量和估计,以及3,5-二硝基水杨酸试剂在基因型间的差异显著。处理后的样品与H0相比的变化表明,应力的影响在处理后至少30分钟开始。因此,耐药植株在处理后30天恢复。聚类结果表明,高、比叶重和叶绿素a含量可作为基因型筛选的指标性状。根据指标性状将基因型分为敏感、半敏感和耐受3组。H2O2浓度(胁迫发生的生化指标)在H2处理后30 min达到980.5µg,在H1处理后第1天达到735.1µg。最后,基因型对同一类型(H2)的两个生化组联合除草剂的敏感性高于不同类型(H1)的基因型。
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来源期刊
Acta Physiologiae Plantarum
Acta Physiologiae Plantarum 生物-植物科学
CiteScore
5.10
自引率
3.80%
发文量
125
审稿时长
3.1 months
期刊介绍: Acta Physiologiae Plantarum is an international journal established in 1978 that publishes peer-reviewed articles on all aspects of plant physiology. The coverage ranges across this research field at various levels of biological organization, from relevant aspects in molecular and cell biology to biochemistry. The coverage is global in scope, offering articles of interest from experts around the world. The range of topics includes measuring effects of environmental pollution on crop species; analysis of genomic organization; effects of drought and climatic conditions on plants; studies of photosynthesis in ornamental plants, and more.
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