Use ofLemna minor L. as a bioassay in allelopathy

Einhellig, Frank A.; Leather, Gerald R.; Hobbs, Lori L.

doi:10.1007/bf00987606

Cited by 88 publications

(51 citation statements)

References 16 publications

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“…Inhibition mechanism of allelopathy occurs through complex metabolism process including cell division and elongation, growth regulation by inhibiting the growth regulator substances, nutrient uptake, photosynthesis, respiration, stomata opening, protein synthesis, carbon storage and pigment synthesis, membrane permeability, and alter the function of specific enzyme (Einhellig et al 1985). The addition of A. excelsa leaf and twig litter extract to yellow and P. urinaria did not affect significantly due to the good defense mechanism of Phyllanthus.…”

Section: Resultsmentioning

confidence: 99%

Dimension growth of Azadirachta excelsa and Phyllanthus spp. in agroforestry system

Dewi¹,

Wijayanto²,

GUSMAINI³

2017

Biodiversitas

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Abstract. Dewi N, Wijayanto N, Gusmaini. 2017 (iii) analyze the growth of meniran in monoculture and agroforestry systems. The result showed that leaf and twigs litter of A. excelsa did not have negative allelopathic effect for the growth of P. urinaria and P. debilis. Agroforestry system did not give significant effect to the growth of A. excelsa . Agroforestry systems reduced the growth of both P. urinaria and P. debilis due to light deficiency.

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Section: Resultsmentioning

confidence: 99%

Dimension growth of Azadirachta excelsa and Phyllanthus spp. in agroforestry system

Dewi¹,

Wijayanto²,

GUSMAINI³

2017

Biodiversitas

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“…Após 12 dias elas atingiram tamanho suficiente para serem transferidas para as caixas plásticas (placas experimentais com 24 células de 2,5 ml cada célula). 1 A solução nutritiva usada para receber as diferentes concentrações e as plântulas de lentilha dágua pré-desenvolvidas na câmara de crescimento, foi "E-medium" (Hillman, 1961), modificada por (Einhellig et al, 1985).…”

Section: Methodsunclassified

Potencial alelopático de 2-benzoxazolinona (boa) e sua interação com atrazine no crescimento de plantas

Souza

Einhellig

1994

Planta daninha

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Dois experimentos de laboratório foram conduzidos na Universidade de South Dakota, Vemillion, SD, EUA, em 1990, para determinar os efeitos do ácido hidroxâmico benzoxazolinona (BOA), do herbicida atrazine e de suas misturas sobre o crescimento e teor de clorofila de lentilha dágua (Lemna minor). BOA na concentração de 0,5 mM foi aplicado em combinação com atrazine a 0,001 e 0,005 mM em caixas plásticas com 24 células de 2,5 ml, contendo 3 frondes de lentilha dágua em solução nutritiva. BOA e atrazine, aplicados isoladamente, inibiram o número, o peso sêco e o teor de clorofila. Atrazine apresentou uma maior ação inibitória que BOA. A combinação BOA (0,05 mM) e atrazine à 0,001 mM foi antagonística. A inibição induzida pelo atrazine a 0,001 mM foi, em parte, neutralizada, porém, com a dose 0,005 mM a sua ação inibitória não foi alterada.

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“…Cinnamic acid, ferulic acid, p-coumaric acid, and other phenylpropanoids commonly identified in the phenomenon of allelopathy are intermediates of bonification. Salicylic acid, in my experience the most growth inhibitory of the benzoic acid allelochemicals (74), appears to be an endogenous signal in systemic activation of plant defenses after a localized exposure to certain viral and fungal pathogens (75)(76)(77). It does not appear to be a signal compound in response to ultraviolet-C radiation (78).…”

Section: Allelochemicals Of Allelopathymentioning

confidence: 99%

“…Investigators frequently use several different assays in a screening procedure. We have employed a whole-plant Lemna bioassay because it is applicable with a small quantity of putative allelochemical and has sensitivity to effects on a range of physiology process (74,89). Physiological Effects.…”

Section: Mode Of Actionmentioning

confidence: 99%

Allelopathy: Current Status and Future Goals

Einhellig

1994

ACS Symposium Series

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148

112

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The phenomenon of allelopathy encompasses all types of chemical interactions among plants and microorganisms. Several hundred different organic compounds (allelochemicals) released from plants and microbes are known to affect the growth or aspects of function of the receiving species. Many new allelochemicals have been identified in recent years and it has become clear that the actions of allelochemicals are important features characterizing the interrelationships among organisms. These compounds influence patterns in vegetational communities, plant succession, seed preservation, germination of fungal spores, the nitrogen cycle, mutualistic associations, crop productivity, and plant defense. Allelopathy is tightly coupled with competition for resources and stress from disease, temperature extremes, moisture deficit, and herbicides. Such stresses often increase allelochemical production and accentuate their action. Allelopathic inhibition typically results from a combination of allelochemicals which interfere with several physiological processes in the receiving plant or microorganism. Other than the autecological study of specific species, there are persistent challenges in allelopathy to determine the mechanism of action of compounds, isolate new compounds, evaluate environmental interactions, and understand activity in the soil. New frontiers will focus on ways to capitalize on allelopathy to enhance crop production and develop a more sustainable agriculture, including weed and pest control through crop rotations, residue management, and a variety of approaches in biocontrol. Other goals are to adapt allelochemicals as herbicides, pesticides, and growth stimulants, modify crop genomes to manipulate allelochemical production, and better elucidate chemical communications that generate associations between microorganisms and higher plants. 0097 ALLELOPATHY: ORGANISMS, PROCESSES, AND APPLICATIONSThe writings of some natural philosophers that date back more than two millenniums show that they recognized chemical influences in nature (1). However, it is the evidence accumulated over the last several decades which has established that external roles for biochemicals, meaning roles that do not directly affect the basic physiology of the producing organism, are pervasive themes characterizing the interrelationships among organisms. This realization does not diminish the respective importance that competition for resources has on the relative success of an organism or a species. Instead, chemical ecology extends our dimensions of understanding and provides new insights into the intricacies of interchanges that occur in an ecosystem, community, or population.Allelopathy, a subset within the broader scope of chemical ecology, is concerned with effects that chemicals of plant or microbial origin have on growth, development, and distribution of other plants and microorganisms in natural communities or agricultural systems. The aims of this overview chapter are to provide a synthesis of the scope of allelopathy, suggest gen...

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Use ofLemna minor L. as a bioassay in allelopathy

Cited by 88 publications

References 16 publications

Dimension growth of Azadirachta excelsa and Phyllanthus spp. in agroforestry system

Dimension growth of Azadirachta excelsa and Phyllanthus spp. in agroforestry system

Potencial alelopático de 2-benzoxazolinona (boa) e sua interação com atrazine no crescimento de plantas

Allelopathy: Current Status and Future Goals

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