Partitioning between primary and secondary metabolism of carbon allocated to roots in four maize genotypes under water deficit and its effects on productivity

Lavinsky, A. O.; Magalhães, P. C.; Ávila, Roniel Geraldo; Diniz, Mariana Melo; Souza, Thiago Corrêa de

doi:10.1016/j.cj.2015.04.008

Cited by 26 publications

(16 citation statements)

References 28 publications

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“…This behavior was also detected when the irrigated treatment was analyzed through the stress index. Lavinsky et al (2015) studied the DKB 390 hybrid under drought imposed only at the flowering stage and reported no changes in the length of fine roots. However, Hund et al (2009) concluded that the tolerant genotype, CML44, presents greater length of fine roots at the V5 growth stage.…”

Section: Resultsmentioning

confidence: 99%

“…In fact, Souza et al (2013) observed that corn hybrids tolerant to drought have a greater proportion of aerenchyma in the root cortex. It should be noted that recent studies have focused on the characterization of morphoanatomical roots in genetic material of corn under drought conditions (Lavinsky et al, 2015). However, there is still a lack of details on these features, since the collection of material for analysis is hampered by the underground location of this organ of water capture (Kumar et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, major advances in understanding how corn plants respond to damages caused by drought have been based on evaluations performed on a single phenological stage (Khodarahmpour & Hamidi, 2011;Ge et al, 2012;Lavinsky et al, 2015), and little is known about corn responses to the cumulative effect of drought throughout its cycle, i.e., in more than one development stage.…”

Section: Introductionmentioning

confidence: 99%

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Corn root morphoanatomy at different development stages and yield under water stress

Souza

Magalhães

Castro

et al. 2016

Pesq. agropec. bras.

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-The objective of this work was to characterize the morphoanatomy of roots and the yield traits of two corn hybrids contrasting for drought tolerance (DKB 390, tolerant; and BRS 1030, sensitive), at different stages of development. Water deficit was imposed for ten days, in a greenhouse, at three growth stages: V5, VT, and R3. These treatments were combined to generate cumulative stress during the plant cycle, as: V5VT, V5R3, VTR3, and V5VTR3. The following were analyzed: root anatomy; proportion of aerenchyma in the cortex; metaxylem number and diameter; phloem thickness; as well as morphological characteristics, such as root length, volume, and surface area, specific root length, length of fine roots, grain yield, and ear length and diameter. Development stage affected the responses to stress: DKB 390 showed the best performance for root morphoanatomy and yield traits, under drought stress, at the reproductive stages, mainly R3, and in the treatments with cumulative stress, especially V5VTR3; whereas BRS 1030 presented higher means for the studied parameters, mainly at the V5 and VT stages, but did not show a higher grain yield under water stress. The greater tolerance of the DKB 390 hybrid to water deficit is probably linked with a memory of pre-exposure to water stress at different growth stages.Index terms: Zea mays, aerenchyma, drought, endoderm, specific root length, WinRhizo. Morfoanatomia radicular em diferentes estádios de desenvolvimento e produtividade do milho sob estresse hídricoResumo -O objetivo deste trabalho foi caracterizar a morfoanatomia radicular e os atributos de rendimento de dois híbridos de milho contrastantes quanto à seca (DKB 390, tolerante; e BRS 1030, sensível), em diferentes estádios de desenvolvimento. A deficiência hídrica foi imposta por dez dias, em casa de vegetação, em três estádios de desenvolvimento: V5, VT e R3. Esses tratamentos foram combinados para gerar estresses acumulativos durante o ciclo da planta, como: V5VT, V5R3, VTR3 e V5VTR3. Foram analisados: anatomia radicular; proporção de aerênquima no cortex; número e diâmetro de metaxilema; espessura do floema; bem como características morfológicas, como comprimento, volume e área de superfície radicular, comprimento específico das raízes, comprimento de raízes finas, rendimento de grãos, e comprimento e diâmetro da espiga. O estádio de desenvolvimento influenciou as respostas ao estresse: DKB 390 apresentou o melhor desempenho quanto à morfoanatomia radicular e aos atributos de rendimento, quando submetido a estresse hídrico, nos estádios reprodutivos, sobretudo em R3, e nos tratamentos acumulativos de estresse, principalmente no V5VTR3; enquanto BRS 1030 apresentou as maiores médias para os parâmetros estudados, principalmente nos estádios V5 e VT, mas não apresentou maior rendimento de grãos sob estresse hídrico. A maior tolerância do híbrido DKB 390 ao estresse hídrico provavelmente relaciona-se à memória de exposição prévia ao estresse hídrico em diferentes estádios de desenvolvimento.Termos para indexação...

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Corn root morphoanatomy at different development stages and yield under water stress

Souza

Magalhães

Castro

et al. 2016

Pesq. agropec. bras.

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“…The reduction in free amino acids accumulation during summer might be due the decline in soil moisture content which reduce the uptake and transport of nitrogen, thereby amino acid biosynthesis and utilization in protein synthesis which might participate in root growth and fruit development. The reduction in the total free amino acids during summer may be also, due to the increase of the ability of the studied species to divert photoassimilates and changes the partitioning of carbon allocated to growth and secondary metabolism including phenols, lignin (Lavinsky et al, 2015).…”

Section: Total Free Amino Acidsmentioning

confidence: 99%

Assessment of Environmental Fluctuations in Phytochemical Constituents of Some Xerophytes Inhabiting Wadi Sudr and Their Antimicrobial Bioactivity

2018

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T RADITIONAL medicinal plants are an important economic source of raw materials for the drug industry. Nowadays, searching for new sources of drug raw materials is an important issue to meet the ever increasing demands. Therefore, quantitative and qualitative phytochemical screening of the dominated xerophytes inhabiting Wadi Sudr, South Sinai, including Retama raetam, Reaumaria hirtella, Tamarix nilotica and Zygophyllum dumosum, was performed. The accumulation levels of some natural bioactive products including phenols, flavonoids and saponins were determined during spring and summer. The investigated species exhibited significant increases in total free amino acids during spring, while they tend to accumulate total soluble sugars, sucrose and secondary metabolites including phenols, tannins and saponins during the dry summer season. Such increments in these metabolites were concomitant with the greatly reducing power capacity. Moreover, the antimicrobial activities of extracts from these shrubs were evaluated against four pathogenic microorganisms (2 bacterial species; Escherichia coli and Staphylococcus aureus and 2 fungal species; Candida albicans and Aspergillus fumigatus). Of the tested alternatives, methanolic extract was the most active fraction, while Tamarix nilotica was the most active plant species against the four tested microorganisms, especially Candida albicans. Furthermore, The MIC of the methanolic fraction of Tamarix nilotica and its effect on ergosterol and leakage of intracellular components of cells of Candida albicans showed that this shrub displays its fungicidal effects by targeting the ergosterol biosynthesis in Candida albicans and disrupting the membrane integrity. In conclusion, these shrubs are promising new sources for potent antioxidants and useful antimicrobial agents.

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“…Selaginella tamariscina chứa một lượng lớn các hợp chất biflavonoid, bao gồm amentoflavone, hinokiflavone, 2',8''-biapigenin, isocryptomerine, sumaflavone, và taiwaniaflavone [15,21]. Một điều đáng chú ý, trong khi amentoflavone là hợp chất biflavonoid được tìm thấy ở đa số các loài Selaginella thì sumaflavone chỉ thu được từ S. tamariscina [8,20]. Cao chiết S. tamariscina đã được chứng minh có nhiều hoạt tính, thí dụ như kháng oxy hóa, kháng viêm, kháng vi sinh (nấm, virus, vi Q khuẩn), chống tia UV, chống dị ứng và có thể có ảnh hưởng đến chu kỳ sinh sản [14].…”

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Biological activities of spike moss Selaginella tamariscina (Beauv.) Spring. collected from Co Thach, Binh Thuan

Bao

Dinh

et al. 2019

Sci. Tech. Dev. J. - Nat. Sci.

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In Vietnam, Selaginella tamariscina (Beauv.) Spring. has been used as a traditional medicine for osteoarthritis, haemorrhage, hepatitis, burn, … However, Selaginella tamariscina is less studied than in other countries. Therefore, this research focuses on study some bioactivities (such as antioxidative, antibacterial activities, and inhibition of albumin denaturation) and preliminary phytochemical screening of six extracts (ethanol extracts of root, leaf, whole plant, petroleum extracts of root, leaf, whole plant) of S. tamariscina collect from Co Thach, Binh Thuan Province. The preliminary phytochemical screening results show that Selaginella tamariscina extracts have most of secondary metabolite groups such as phenolics, alkaloids, flavonoids, steroids, and lactone. The antibacterial activity of the ethanol extract of root is higher than that of other extracts. Moreover, the ethanol extract of root also has the highest reducing ability and free radical scavenging activity, with EC50 = 1.590 ± 0.091mg/ml. In the anti-denaturation of albumin test, the petroleum ether extract of whole plant has the lowest IC50 at 99 ± 5μg/ml.

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Partitioning between primary and secondary metabolism of carbon allocated to roots in four maize genotypes under water deficit and its effects on productivity

Cited by 26 publications

References 28 publications

Corn root morphoanatomy at different development stages and yield under water stress

Corn root morphoanatomy at different development stages and yield under water stress

Assessment of Environmental Fluctuations in Phytochemical Constituents of Some Xerophytes Inhabiting Wadi Sudr and Their Antimicrobial Bioactivity

Biological activities of spike moss Selaginella tamariscina (Beauv.) Spring. collected from Co Thach, Binh Thuan

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