Morphophysiological responses of Crambe abyssinica Hochst. lineages submitted to water deficit during flowering

RESUMO – A resposta à adubação nitrogenada da cultura do milho é dependente do tipo de solo, sistema de cultivo, dose empregada e cultura antecessora. Nesse contexto, objetivou-se com o presente trabalho avaliar os efeitos dos resíduos vegetais de plantas de cobertura e da adubação nitrogenada no milho cultivado em sequência, sob sistema de plantio direto em consolidação no Cerrado. O experimento foi constituído de um fatorial 10 x 4, em delineamento de blocos casualizados e esquema de parcelas subdivididas, com quatro repetições. Os tratamentos das parcelas foram os resíduos do cultivo de dez plantas de cobertura (Cajanus cajan, Canavalia ensiformis, Crambe abyssinica, Crotalaria juncea, Crotalaria ochroleuca, Crotalaria spectabilis, Mucuna aterrima, Pennisetum glaucum, Raphanus sativus e Urochloa ruziziensis) e, nas subparcelas, foram testadas quatro doses de nitrogênio (0, 50, 100 e 150 kg ha-1 de N) em cobertura no estádio V5 da cultura do milho. Observou-se baixa resposta à adubação nitrogenada em cobertura, o que foi atribuído principalmente à ocorrência de déficit hídrico nas fases de florescimento e enchimento de grãos. De modo geral, as características agronômicas do milho foram mais influenciadas pela adubação nitrogenada do que pelas plantas de cobertura cultivadas anteriormente. O ganho médio de produtividade de grãos foi da ordem de 3,7 kg para cada 1 kg de N aplicado. O milho após Urochloa ruziziensis e Crambe abyssinica apresenta menor produtividade em relação ao uso das outras espécies de plantas de cobertura, independentemente da adubação nitrogenada.Palavras-chave: adubação verde, sistema conservacionista, veranico, Zea mays.COVER CROPS AND NITROGEN FERTILIZATION ON MAIZE GROWN IN NO-TILLAGE SYSTEM UNDER WATER DEFICIT ON CERRADO SOILABSTRACT - The response to nitrogen fertilization of the corn is dependent on the type of soil, cropping system, dose used and preceding crop. In this context, the goal of the present study was to evaluate the effects of cover crops residues and nitrogen fertilization on corn grown in succession, under no-tillage system in the Cerrado region. The experiment was arranged in a factorial 10 x 4, in a randomized complete block design and subdivided plot scheme, with four replications. The treatments of the plots were the residues of ten cover crops (Cajanus cajan, Canavalia ensiformis, Crambe abyssinica, Crotalaria juncea, Crotalaria ochroleuca, Crotalaria spectabilis, Mucuna aterrima, Pennisetum glaucum, Raphanus sativus and Urochloa ruziziensis) and in the subplots four nitrogen doses (0, 50, 100 and 150 kg ha-1 of N) were tested in the V5 stage of the corn. A low response to nitrogen fertilization was observed, which was mainly attributed to the occurrence of water deficit at the flowering and grain filling stages. In general, the agronomic characteristics of corn were more influenced by nitrogen fertilization than by the cover crops previously cultivated. The average gain of grain yield was of the order of 3.7 kg for each 1 kg ha-1 of N applied. Corn after Urochloa ruziziensis and Crambe abyssinica presented lower productivity compared to the use of other cover crop species, regardless nitrogen fertilization.Keywords: green manure, conservation tillage system, summer water deficit, Zea mays.

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Tolerance of crambe (Crambe abyssinica Hochst) to salinity and water stress during seed germination and initial seedling growth

Ciência e Agrotecnologia ◽

10.1590/1413-7054201943025418 ◽

2019 ◽

Vol 43 ◽

Author(s):

Martha Freire da Silva ◽

Eduardo Fontes Araújo ◽

Laércio Junio da Silva ◽

Hugo Tiago Ribeiro Amaro ◽

Luiz Antônio dos Santos Dias ◽

...

Keyword(s):

Antioxidant Enzymes ◽

Salt Stress ◽

Seed Germination ◽

Water Deficit ◽

Arid Environments ◽

Crambe Abyssinica ◽

Root And Shoot Length ◽

Early Seedling ◽

Base Water Potential ◽

Germination And Growth

ABSTRACT Crambe is an oilseed plant whose oil is suitable for various industrial purposes, such as production of biodiesel, plastics, rubbers, and cosmetics. There are reports of the rusticity of this species and its potential for growth in arid and semi-arid environments, where water scarcity and soil salinity are common. However, studies regarding the tolerance of its seeds to these stresses and the physiological responses triggered during germination and seedling establishment under these conditions are incipient. The objective of this study was to evaluate the tolerance of crambe seeds to water deficit and salt stress during germination and early seedling development, as well as to investigate the role of antioxidant enzymes on tolerance to these conditions. The seeds were exposed to water and salt stresses and their performance was analyzed. Seed water content, imbibition rate, percentage and speed of germination, and the base water potential for seed germination were evaluated. In the seedlings, the following measurements were made: root and shoot length, fresh and dry matter of roots and shoots, moisture content, and activity of the enzymes superoxide dismutase (SOD), catalase (CAT), and peroxidase (POX). Water deficit and salt stress reduce the water uptake rate of the seeds, the germination and growth of seedlings. The crambe seeds had higher tolerance to salt stress than to water deficit. Absorption of salt and the action of the SOD and CAT antioxidant enzymes are part of the tolerance mechanisms of crambe seeds to salt stress.

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Nitric oxide mitigates the effect of water deficit in Crambe abyssinica

Plant Physiology and Biochemistry ◽

10.1016/j.plaphy.2018.06.012 ◽

2018 ◽

Vol 129 ◽

pp. 310-322 ◽

Cited By ~ 15

Author(s):

Priscila Ferreira Batista ◽

Alan Carlos Costa ◽

Caroline Müller ◽

Robson de Oliveira Silva-Filho ◽

Fábia Barbosa da Silva ◽

...

Keyword(s):

Nitric Oxide ◽

Water Deficit ◽

Crambe Abyssinica ◽

Effect Of Water

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PLANTAS DE COBERTURA E ADUBAÇÃO NITROGENADA NO MILHO EM PLANTIO DIRETO SOB INFLUÊNCIA DE DÉFICIT HÍDRICO EM SOLO DE CERRADO

Revista Brasileira de Milho e Sorgo ◽

10.18512/rbms.v15i3.715 ◽

2017 ◽

Vol 15 (3) ◽

pp. 439

Author(s):

GUILHERME FELISBERTO ◽

PATRÍCIA APARECIDA DE CARVALHO FELISBERTO ◽

LEANDRO FLÁVIO CARNEIRO ◽

PAULO CÉSAR TIMOSSI ◽

FLÁVIO HIROSHI KANEKO ◽

...

Keyword(s):

Water Deficit ◽

Cover Crops ◽

Nitrogen Fertilization ◽

Cajanus Cajan ◽

Raphanus Sativus ◽

No Tillage ◽

Crambe Abyssinica ◽

Canavalia Ensiformis ◽

Tillage System ◽

Crotalaria Spectabilis

RESUMO – A resposta à adubação nitrogenada da cultura do milho é dependente do tipo de solo, sistema de cultivo,dose empregada e cultura antecessora. Nesse contexto, objetivou-se com o presente trabalho avaliar os efeitos dosresíduos vegetais de plantas de cobertura e da adubação nitrogenada no milho cultivado em sequência, sob sistema deplantio direto em consolidação no Cerrado. O experimento foi constituído de um fatorial 10 x 4, em delineamento deblocos casualizados e esquema de parcelas subdivididas, com quatro repetições. Os tratamentos das parcelas foram osresíduos do cultivo de dez plantas de cobertura (Cajanus cajan, Canavalia ensiformis, Crambe abyssinica, Crotalariajuncea, Crotalaria ochroleuca, Crotalaria spectabilis, Mucuna aterrima, Pennisetum glaucum, Raphanus sativus eUrochloa ruziziensis) e, nas subparcelas, foram testadas quatro doses de nitrogênio (0, 50, 100 e 150 kg ha-1 de N)em cobertura no estádio V5 da cultura do milho. Observou-se baixa resposta à adubação nitrogenada em cobertura, oque foi atribuído principalmente à ocorrência de déficit hídrico nas fases de florescimento e enchimento de grãos. Demodo geral, as características agronômicas do milho foram mais influenciadas pela adubação nitrogenada do que pelasplantas de cobertura cultivadas anteriormente. O ganho médio de produtividade de grãos foi da ordem de 3,7 kg paracada 1 kg de N aplicado. O milho após Urochloa ruziziensis e Crambe abyssinica apresenta menor produtividade emrelação ao uso das outras espécies de plantas de cobertura, independentemente da adubação nitrogenada.Palavras-chave: adubação verde, sistema conservacionista, veranico, Zea mays.COVER CROPS AND NITROGEN FERTILIZATION ON MAIZE GROWN IN NO-TILLAGE SYSTEM UNDER WATER DEFICIT ON CERRADO SOILABSTRACT - The response to nitrogen fertilization of the corn is dependent on the type of soil, cropping system, doseused and preceding crop. In this context, the goal of the present study was to evaluate the effects of cover crops residuesand nitrogen fertilization on corn grown in succession, under no-tillage system in the Cerrado region. The experimentwas arranged in a factorial 10 x 4, in a randomized complete block design and subdivided plot scheme, with fourreplications. The treatments of the plots were the residues of ten cover crops (Cajanus cajan, Canavalia ensiformis,Crambe abyssinica, Crotalaria juncea, Crotalaria ochroleuca, Crotalaria spectabilis, Mucuna aterrima, Pennisetumglaucum, Raphanus sativus and Urochloa ruziziensis) and in the subplots four nitrogen doses (0, 50, 100 and 150 kgha-1 of N) were tested in the V5 stage of the corn. A low response to nitrogen fertilization was observed, which wasmainly attributed to the occurrence of water deficit at the flowering and grain filling stages. In general, the agronomiccharacteristics of corn were more influenced by nitrogen fertilization than by the cover crops previously cultivated. Theaverage gain of grain yield was of the order of 3.7 kg for each 1 kg ha-1 of N applied. Corn after Urochloa ruziziensisand Crambe abyssinica presented lower productivity compared to the use of other cover crop species, regardlessnitrogen fertilization.Keywords: green manure, conservation tillage system, summer water deficit, Zea mays.

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Sunflower seedlings subjected to increasing stress by water deficit: Changes in O2.- production related to the composition of thylakoid membranes

Physiologia Plantarum ◽

10.1034/j.1399-3054.1996.960314.x ◽

1996 ◽

Vol 96 (3) ◽

pp. 446-452 ◽

Cited By ~ 2

Author(s):

Cristina L. M. Sgherri ◽

Calogero Pinzino ◽

Flavia Navari-Izzo

Keyword(s):

Water Deficit ◽

Thylakoid Membranes ◽

O2 Production

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Genetic basis of isoflavone accumulation during soybean seed development : special focus on water-deficit conditions

10.32469/10355/6852 ◽

2009 ◽

Author(s):

Juan Jose Gutierrez-Gonzalez

Keyword(s):

Water Deficit ◽

Seed Development ◽

Genetic Basis ◽

Soybean Seed ◽

Special Focus

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The study of important agronomic traits by multivariate analysis in winter rapeseed cultivars

JOURNAL OF ADVANCES IN AGRICULTURE ◽

10.24297/jaa.v1i1.4240 ◽

2014 ◽

Vol 1 (1) ◽

pp. 20-24

Author(s):

Gader Ghaffari ◽

Farhad Baghbani ◽

Behnam Tahmasebpour

Keyword(s):

Water Potential ◽

Water Deficit ◽

Leaf Water Potential ◽

Seed Weight ◽

Dry Weight ◽

Total Variance ◽

Water Deficit Stress ◽

The Third ◽

High Eigenvalue ◽

Winter Rapeseed

In order to group winter rapeseed cultivars according to evaluated traits, an experiment was conducted in the Research Greenhouse of Agriculture Faculty, University of Tabriz - IRAN. In the experiment were included 12 cultivars of winter rapeseed and 3 levels of water deficit stress. Gypsum blocks were used to monitor soil moisture. Water deficit stress was imposed from stem elongation to physiological maturity. According to the principal component analysis, five principal components were chosen with greater eigenvalue (more than 0.7) that are including 81.34% of the primeval variance of variables. The first component that explained the 48.02% of total variance had the high eigenvalue. The second component could justify about 13.64% of total variance and had positive association with leaf water potential and proline content and had negative relationship with leaf stomatal conductivity. The third, fourth and fifth components expressed around, 10.18, 4.83 and 4.68% of the total variance respectively. The third component had the high eigenvalue for plant dry weight. The fourth component put 1000-seed weight, seed yield, Silique per Plant and root dry weight against plant dry weight, chlorophyll fluorescence and leaf water potential. The fifth component had the high eigenvalue for root dry weight, root volume and 1000-seed weight.

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