ACS Sustainable Chemistry & Engineering
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2020
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IF 7.632
Gang Tang,Junfan Niu,Jingyue Tang,Jiale Yang,Zhiyuan Zhou,Yunhao Gao,Xi Chen,Rong Tang,Yuyang Tian,Yan Li,Jianqiang Li,Yongsong Cao
As one of the plant growth regulators, mepiquat chloride (MC) has become one of the most useful tools to manage plant geometry during cotton growth and development. Since it is highly water-soluble and needs to be applied repeatedly during cotton growth, there is an urgent need to design a novel effective formulation for reducing unwanted loss of MC and prolonging its effective duration. Polymerized ionic liquids (PILs), as a particular class of ionic liquids are composed of a polymeric backbone and an IL species in each monomer repeating unit, which exhibits excellent physical and chemical properties. In this work, PILs based on MC (MPILs) were prepared by the acid–base neutralization between poly(acrylic acid) (PAA) and N,N-dimethylpiperidinium hydroxide derived from MC and were characterized by scanning electron microscopy (SEM), 1H NMR, Fourier transform infrared spectroscopy (FTIR), and UV–vis spectroscopy. The results showed that the N,N-dimethylpiperidinium cation was stably ionic-paired with PAA when the molar ratio of PAA to N,N-dimethylpiperidinium hydroxide was 10:6. MPILs based on MC were endowed with the properties of polymer, and N,N-dimethylpiperidinium cation could be released in a limited manner by attractive forces between oppositely charged ions. Compared with MC, MPILs had higher retention on cotton leaves and exhibited better rainfastness. The control efficacy on the lateral branch length of the cotton plant using MPILs once was almost the same as that using MC twice at dose of 150 g AI ha–1 in the same period. The prepared MPILs showed a long-lasting activity in controlling the lengths of lateral branches and height of the cotton plant and made cotton plant type structures more compact than MC. Thus, this work makes contributions to optimize the application of MC by reducing the frequency of using MC, and MPILs demonstrated a great potential in MC application in the future.
研究领域:
植物学
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农业科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2023
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IF 9.8
Guofeng Chang,Hui Xue,Jichao Ji,Li Wang,Xiangzhen Zhu,Kaixin Zhang,Dongyang Li,Xueke Gao,Lin Niu,Mengxue Gao,Junyu Luo,Jinjie Cui
The effects of non-insecticidal agrochemicals on pest natural predators remain largely unexplored except bees and silkworm. The herbicide quizalofop-p-ethyl (QpE), fungicide thiophanate-methyl (TM), and plant growth regulator mepiquat chloride (MC) have been extensively applied as non-insecticidal agrochemicals. Here, we systematically evaluated multiple effects of these 3 non-insecticidal agrochemicals on three generations of Propylea japonica , an important agroforestry predatory beetle, including the effects on its development, reproduction, enterobacteria, and transcriptomic response. The results showed that QpE exhibited a hormetic effect on P. japonica , thus significantly increasing the survival rate of generation 2 (F2) females, generation 3 (F3) females, and F3 males and body weight of F3 males. However, three successive generations exposed to TM and MC had no significant effect on longevity, body weight, survival rate, pre-oviposition period, and fecundity of P. japonica . Additionally, we investigated the effects of MC, TM, and QpE exposure on gene expression and gut bacterial community of F3 P. japonica . Under MC, TM, and QpE exposure, the overwhelming genes of P. japonica (99.90 %, 99.45 %, and 99.7 %) remained unaffected, respectively. Under TM and MC exposure, differentially expressed genes (DEGs) were not significantly enriched in any KEGG pathway, indicating TM and MC did not significantly affect functions of P. japonica , but under QpE exposure, the expression levels of drug metabolism-related genes were down-regulated. Although QpE treatment did not affect gut dominant bacterial community composition, it significantly increased relative abundances of detoxification metabolism-related bacteria such as Wolbachia , Pseudomonas and Burkholderia in P. japonica . However, TM and MC had no significant effect on the gut bacterial community composition and relative abundance in P. japonica . This study revealed for the first time the mechanism by which P. japonica might compensate for gene downregulation-induced detoxification metabolism decline through altering symbiotic bacteria under QpE exposure. Our findings provide reference for the rational application of non-insecticidal agrochemicals.
研究领域:
昆虫学
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生态毒理学
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分子生物学
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微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）