N deposition affects allelopathic potential of Amaranthus retroflexus with different distribution regions

Wang, Congyan; Liu, Jun; Zhou, Jiawei

doi:10.1590/0001-3765201720160513

Cited by 21 publications

(10 citation statements)

References 34 publications

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“…Earlier studies presented that the improved levels of available N can trigger obvious alleviation on the unfavorable effects of stress environments (including drought) on plant growth performance Wang et al 2017cWang et al , 2017dXiong et al 2018). However, earlier results also exhibited that the combined drought and N fertilization addressed synergistic effects on plant growth performance because of the increased aboveground portion of the aboveground portion and the corresponding enhanced water loss area and transpiration intensity (Meng et al 2019;Chavoushi et al 2020).…”

Section: Discussionmentioning

confidence: 99%

“…Similar results were obtained in this study. Generally, plant species can present accelerated growth performance under N fertilization, mostly owing to the relieved condition addressed by N deficiencies via the improved levels of available N Wang et al 2017bWang et al , 2017cWang et al , 2017dGao et al 2019b). This phenomenon may be because N is one of the vital nutrient elements for plant growth performance (Villar-Salvador et al 2013;van den Elzen et al 2018;Xiong et al 2018).…”

Section: Discussionmentioning

confidence: 99%

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Atmospheric N deposition alleviates the unfavorable effects of drought on wheat growth

et al. 2020

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Drought and atmospheric nitrogen deposition (AND) become increasingly serious in recent decades owing to the progressively rising anthropogenic activities. Thus, it is significant to assess the effects of combined drought and AND on plant morphological and physiological performance (MorPhyPer) to better elucidate the mechanisms that drive the successful plant life-history strategies under the combined drought and AND. The objective of this study is to evaluate the combined drought [imitated by polyethylene glycol-6000 (PEG 6000) solution] with different degrees and AND [a mixed N with a 1: 1: 1 ratio of NH 4-N: NO 3-N: CO(NH 2) 2-N] with different concentrations on MorPhyPer of wheat (Triticum aestivum L.) via the garden-pot cultivation under the condition with natural light for nearly sixty days. Results showed that drought dramatically reduced MorPhyPer of wheat. This phenomenon may be attributed to the gradually enhanced osmotic pressure generated by the dehydrated condition, the enhanced degrees of reactive oxygen species, the raised level of plant cell cytoplasm membrane peroxidation, and/or the downgraded plant enzymatic defensive ability. AND notably improved MorPhyPer of wheat mostly owing to the relieved N deficiencies. The combined drought and AND antagonistically affect plant supporting ability, leaf photosynthetic area, and belowground growing competitiveness of wheat. The reason may be due to the increased belowground moisture content under the combined drought and AND which can improve the efficiency and capacity of nutrients absorption (mainly absorb more N nutrients) by root and transport to the aboveground portion and subsequently raise the level of drought resistance. The reason may be also attributed to the enhanced leaf photosynthetic area which can capture more sunlight and increase the tolerance to the adverse environment. Accordingly, AND notably alleviated the unfavorable effects of drought on MorPhyPer of wheat basically.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Atmospheric N deposition alleviates the unfavorable effects of drought on wheat growth

et al. 2020

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“…Lettuce germination experiments were undertaken in Petri dishes at 25 °C for 10 days with a 12‐h light photoperiod (light intensity: 2200 Lux) in early May 2018. The method for Petri dish incubation is described in our previous studies (Wang et al 2016a, 2017c,d,e, 2018d, 2019a). The number of germinated seeds (after radicle emergence) was recorded each day from the start of incubation.…”

Section: Methodsmentioning

confidence: 99%

Heavy metal pollution improves allelopathic effects of Canada goldenrod on lettuce germination

Wei

Shu

et al. 2020

Plant Biol J

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• Large amounts of heavy metals have been released into the environment. Thus, the allelopathic effects of invasive alien species on the germination performance of cooccurring indigenous species may be altered or even heightened with the rapid growth in heavy metal pollution. • This study evaluated the impacts of Canada goldenrod (Solidago canadensis L.) leaf extracts at concentrations of 0, 10 or 20 gl 1 on the germination of lettuce under different forms of heavy metal pollution (Cu 2+ , Pb 2+ or a combination of Cu 2+ and Pb 2+ ; 35 mgl 1) during incubation in Petri dishes for 10 days. • Goldenrod leaf extracts (high concentration) reduced growth of aboveground and belowground parts of lettuce as well as competition for light and soil nutrients. However, low concentrations of goldenrod leaf extracts dramatically improved growth of lettuce roots, competition for light, soil nutrient availability, leaf photosynthetic area and growth competitiveness. The combination of goldenrod leaf extracts and heavy metal pollution was synergistic on most lettuce germination parameters, probably because high concentrations of goldenrod leaf extracts together with heavy metal pollution had a synergistic negative impact on lettuce germination. • Consequently, increased levels of heavy metal pollution may favour invasion of invasive alien species while largely suppressing germination of indigenous species.

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“…Moreover, it has a small seed which is quite easy to handle in the lab-scale experiment. Also, several researchers [ 44 , 45 , 46 , 47 ] have reported the use of this dicot as a test plant in allelopathic studies. Positive results of this research could be utilized to develop cost-effective natural herbicides in the near future.…”

Section: Introductionmentioning

confidence: 99%

Herbicidal Activities of Some Allelochemicals and Their Synergistic Behaviors toward Amaranthus tricolor L.

2017

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Seven allelochemicals, namely R-(+)-limonene (A), vanillin (B), xanthoxyline (C), vanillic acid (D), linoleic acid (E), methyl linoleate (F), and (±)-odorine (G), were investigated for their herbicidal activities on Chinese amaranth (Amaranthus tricolor L.). At 400 μM, xanthoxyline (C) showed the greatest inhibitory activity on seed germination and seedling growth of the tested plant. Both vanillic acid (D) and (±)-odorine (G) inhibited shoot growth, however, apart from xanthoxyline (C), only vanillic acid (D) could inhibit root growth. Interestingly, R-(+)-limonene (A) lightly promoted root length. Other substances had no allelopathic effect on seed germination and seedling growth of the tested plant. To better understand and optimize the inhibitory effects of these natural herbicides, 21 samples of binary mixtures of these seven compounds were tested at 400 μM using 0.25% (v/v) Tween® 80 as a control treatment. The results showed that binary mixtures of R-(+)-limonene:xanthoxyline (A:C), vanillin:xanthoxyline (B:C), and xanthoxyline:linoleic acid (C:E) exhibited strong allelopathic activities on germination and seedling growth of the tested plant, and the level of inhibition was close to the effect of xanthoxyline (C) at 400 µM and was better than the effect of xanthoxyline (C) at 200 µM. The inhibition was hypothesized to be from a synergistic interaction of each pair of alleochemicals. Mole ratios of each pair of allelochemicals ((A:C), (B:C), and (C:E)) were then evaluated, and the best ratios of the binary mixtures A:C, B:C and C:E were found to be 2:8, 2:8, and 4:6 respectively. These binary mixtures significantly inhibited germination and shoot and root growth of Chinese amaranth at low concentrations. The results reported here highlight a synergistic behavior of some allelochemicals which could be applied in the development of potential herbicides.

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N deposition affects allelopathic potential of Amaranthus retroflexus with different distribution regions

Cited by 21 publications

References 34 publications

Atmospheric N deposition alleviates the unfavorable effects of drought on wheat growth

Atmospheric N deposition alleviates the unfavorable effects of drought on wheat growth

Heavy metal pollution improves allelopathic effects of Canada goldenrod on lettuce germination

Herbicidal Activities of Some Allelochemicals and Their Synergistic Behaviors toward Amaranthus tricolor L.

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