Micro-morphology of common bean (Phaseolus vulgaris L.) nodules undergoing senescence

Fernández-Luqueño, F.; Dendooven, Luc; Munive, Antonio; Corlay-Chee, Langen; Serrano-Covarrubias, Luis Manuel; Espinosa-Victoria, David

doi:10.1007/s11738-008-0153-7

Cited by 27 publications

(13 citation statements)

References 36 publications

(35 reference statements)

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“…Com o início do enchimento de vagens no feijoeiro, os nódulos passam por uma série de alterações estruturais e fisiológicas, que resultam na sua senescência e perda da capacidade de fixar N 2 durante um estádio de alta demanda metabólica para a formação dos grãos (Fernández-Luqueño et al, 2008), que assim não será suprida por meio da simbiose. Nessas situações, e quando o suprimento de N no solo não é suficiente, a demanda de N do cultivo pode ser satisfeita com o fertilizante nitrogenado aplicado em cobertura (Franco et al, 1979;Soratto et al, 2011).…”

Section: Discussionunclassified

Resposta do Feijoeiro Comum à Inoculação com Rizóbio e Suplementação com Nitrogênio Mineral em Dois Biomas Brasileiros

Brito

Pacheco

Filho

et al. 2015

Rev. Bras. Ciênc. Solo

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O feijoeiro comum (Phaseolus vulgaris L.) pode se beneficiar da fixação biológica de N2, mas respostas inconsistentes da cultura à inoculação com rizóbio indicam a necessidade de aplicação de N mineral complementar. Este trabalho teve por objetivo avaliar a resposta do feijoeiro à inoculação com rizóbio, associada à suplementação com N mineral, nos biomas Cerrado e Mata Atlântica. Foram conduzidos quatro experimentos de campo, dois em Santo Antônio de Goiás, GO, um em Valença, RJ e um em Macaé, RJ, onde a inoculação com estirpes comerciais de rizóbio foi comparada à inoculação com a estirpe BR 923 de Sinorhizobium sp., à adubação com N mineral e à suplementação com N na semeadura e em cobertura. A avaliação da população nativa de rizóbio indicou 105 células g-1 no solo na área experimental em Goiás, anteriormente cultivada com feijão, e 102células g-1 em Valença, anteriormente mantida com pastagem. Nos dois experimentos em Goiás, o rendimento de grãos, da ordem de 2.100 kg ha-1, não diferiu entre os tratamentos testemunha absoluta, inoculação com rizóbio ou aplicação de 120 kg ha-1 de N. Em Valença, a inoculação com estirpes comerciais forneceu rendimentos da cultivar Ouro Negro superiores à testemunha absoluta, na ausência de adubação de cobertura; na presença de 40 kg ha-1 de N em cobertura, a inoculação com rizóbio proporcionou rendimento de 3.420 kg ha-1, superior aos demais tratamentos. Na média das diferentes fontes de N na semeadura, a adubação de cobertura aumentou a produção de grãos de 2.367 para 2.542 kg ha-1. Em Macaé, em solo com alto teor de matéria orgânica, os maiores rendimentos foram obtidos com inoculação das estirpes comerciais associada a 40 kg ha-1 de N em cobertura, com efeito deletério da adubação de 80 kg ha-1 de N no plantio. Concluiu-se que em áreas sem cultivo prévio de feijão, a inoculação com estirpes comerciais de rizóbio aumentou o rendimento de grãos, em particular quando associada à adubação de cobertura com N.

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Section: Discussionunclassified

Resposta do Feijoeiro Comum à Inoculação com Rizóbio e Suplementação com Nitrogênio Mineral em Dois Biomas Brasileiros

Brito

Pacheco

Filho

et al. 2015

Rev. Bras. Ciênc. Solo

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“…Longitudinal 4-µm-or 8-10-µm-thick sections (depending on the age of the ovaries) were made with an American Optics Spencer 820 Rotary Microtome. The sections were placed on microscopic slides, dried at 60 • C for at least 1 h, and then stained with Safranin O-Fast Green (Fernandez-Luqueno et al, 2008). The samples were analyzed under light and dark field illumination with a Nikon Eclipse 55i microscope.…”

Section: Determination Of Embryo Sac Developmental Stagesmentioning

confidence: 99%

Studies on Gynogenesis Induction in Cassava (Manihot esculenta Crantz) Unpollinated Ovule Culture

et al. 2020

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Cassava (Manihot esculenta Crantz) is an important crop for subsistence farming in tropical and subtropical regions. There is a need to increase the rate of genetic gain to develop varieties adapted to new environmental conditions affected by climate change, which also influences the patterns of pests and diseases. The rate of cassava genetic improvement is limited by the difficulty in obtaining true-breeding types (inbred/homozygous lines). Cassava inbreeding obtained through conventional sequential self-pollination increases exposure of useful recessive traits and breeding value of progenitors. However, it takes 10-15 years to produce homozygous lines through successive self-pollination. Doubled haploid (DH) technology is a functional alternative to progressive self-pollination, and is already widely used in major crops to accelerate inbreeding. This work aimed at developing a protocol for the culture of isolated ovules and the induction of gynogenesis in cassava. Basic groundbreaking studies on cassava embryo sac development are presented. A protocol using unpollinated ovules collected from ovaries 1 day after anthesis is described. In the unpollinated-cultured ovules, the presence of embryos formed probably from the egg cells and not surrounded by the endosperm, was documented by anatomical analyses. This achievement is an important first step in the development of a reproducible gynogenesis protocol for the generation of doubled haploids in cassava. This protocol can also be useful as a starting point to obtain DHs using alternative methods of induction such as pollination of cassava with pollen of distant species or with cassava pollen irradiated with gamma rays.

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“…The high levels of CO 2 produced towards the end of the experiments could be related to rapid root growth and the beginning of root decomposition. For example, common bean plants at 49 days after sowing (flowering and nodule senescence begins) showed a decrease in the number of nodules, and their nodule cell walls slowly became thinner and degraded [14] thereby improving the environment for the growth of microorganisms and increasing the production of CO 2 towards the end of the experiments.…”

Section: Third Experiments Under Greenhouse Conditionsmentioning

confidence: 99%

Greenhouse Gases Production from Some Crops Growing Under Greenhouse Conditions

López-Valdez¹,

Fernández-Luqueño²,

CarolinaPérez-Morales³

et al. 2016

Greenhouse Gases

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Greenhouse gases, such as carbon dioxide CO , nitrous oxide N O and methane CH , play an important role in global climate change. For example, CO production occurs as a result of the seasonal cycles of the biotic processes of photosynthesis and respiration, as well as through anthropogenic activities and abiotic processes such as the burning of fossil fuels. Many activities, such as "gribusiness the production of crops and animals for food create greenhouse gases. Our research group has studied several soil treatments such as wastewater, wastewater sludge, vermicomposting, and urea among others, in order to study the effects of soil treatments on the production of greenhouse gases CO , N O, and CH in several cultivars, but mainly in maize, sunflower and the common bean. The principal aim of this chapter is to show how these greenhouse gases are affected by the type of treatment, the properties of the soil, and the cultivar in question. We also look at which processes are involved in the production of CO , N O, and CH from cultivated soil. We present a review of several experiments carried out under in vitro or greenhouse conditions.

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Micro-morphology of common bean (Phaseolus vulgaris L.) nodules undergoing senescence

Cited by 27 publications

References 36 publications

Resposta do Feijoeiro Comum à Inoculação com Rizóbio e Suplementação com Nitrogênio Mineral em Dois Biomas Brasileiros

Resposta do Feijoeiro Comum à Inoculação com Rizóbio e Suplementação com Nitrogênio Mineral em Dois Biomas Brasileiros

Studies on Gynogenesis Induction in Cassava (Manihot esculenta Crantz) Unpollinated Ovule Culture

Greenhouse Gases Production from Some Crops Growing Under Greenhouse Conditions

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