Contribution of mineral nutrition to the response of barley seedlings to polyethylene glycol–induced mild water stress

Kocheva, Konstantina; Georgiev, G. I.; Vunkova-Radeva, Reneta

doi:10.1002/jpln.200625182

Cited by 6 publications

(3 citation statements)

References 33 publications

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“…The treatment of plant roots with solutions of high molecular weight polyethylene glycol (PEG) has been widely used to induce osmotic stress in hydroponic culture systems (Molnár et al. 2004, 2007, Kocheva et al. 2007).…”

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confidence: 99%

Molecular cytogenetic identification of a wheat‐Aegilops geniculata Roth spontaneous chromosome substitution and its effects on the growth and physiological responses of seedlings to osmotic stress

Landjeva¹,

Kocheva²,

Karceva³

et al. 2011

Plant Breeding

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The karyotypic constitution of a wheat-Aegilops geniculata 2M g (2A) disomic substitution line, isolated from backcross progenies of a wheat-Ae. geniculata amphiploid, was determined using multicolour fluorescence in situ hybridization and genomic in situ hybridization. The ability of the 2M g chromosome to compensate for wheat chromosome 2A was studied in relation to phenotypic traits and the growth and physiological responses of seedlings to polyethylene glycol (PEG)-induced osmotic stress. Plants of the substitution line had altered spike and seed morphologies, increased tillering, moderately reduced productivity and maintained better seedling growth in stress conditions. PEG treatment caused severe stress, resulting in considerable water loss from the leaves. Under this stress, the substitution line retained better leaf water status and suffered less oxidative damage than the wheat parent, as indicated by higher relative water content and lower malondialdehyde accumulation. These changes were consistent with more sustained membrane stability in the substitution line, evidenced by the lower value of the membrane injury index and the less-prominent increase in ion efflux from the apoplast.

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confidence: 99%

Molecular cytogenetic identification of a wheat‐Aegilops geniculata Roth spontaneous chromosome substitution and its effects on the growth and physiological responses of seedlings to osmotic stress

Landjeva¹,

Kocheva²,

Karceva³

et al. 2011

Plant Breeding

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“…In addition to the discussed changes in carbon assimilation, water stress may restrain nitrate acquisition by the roots, as well as restrict the ability of plants to assimilate and reduce nitrogen Kocheva et al, 2007). In most herbaceous plants, NR activity takes place predominantly in the leaves (Scheurwater et al, 2002;Reda et al, 2011).…”

Section: Maintenance Of Tissue Water Status Helps the Plants To Avoidmentioning

confidence: 99%

Screening Pepper Genotypes to Obtain Tolerant Rootstocks to Salt and Water Stress: Physiological and Agronomical Responses of the Grafted Plants

Casañ¹

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Noviembre 2015 Programa de Doctorado en Recursos y Tecnologías Agrarias I | SUMMARYPepper is a vegetable of extraordinary economic and social importance in our country. Unfortunately, the persistent exploitation of the land, the monoculture and the intensification of production processes, lead to the development of soil diseases. This coupled with the abiotic stress, mainly the salinity of waters and soil, suboptimal temperatures and water stress, can induce the appearance of physiological disorders in peppers as the Blossom-end rot (BER) and cracking or cracked, induce plant senescence and decrease not only production, but also the quality of the product. Salinity and water shortages are two among the biggest environmental problems that crops have to face in the Mediterranean area. A way to overcome the stresses under the prism of an ecological or integrated crop management, is the use of grafted plants as adaptation strategy. Although there has been remarkable progress in this technique (mainly in tomato, melon, watermelon), in the cultivation of pepper use remains rare. In this Doctoral thesis several pepper genotypes have been selected through different physiological parameters which indicate tolerance to salt and water stress. Commercial cultivars were grafted onto the selected genotypes and were grown under water stress, salinity and control conditions studying several physiological, agronomic responses and the interaction rootstock/scion.The results obtained concluded that genotypes selected and used as rootstocks improved commercial varieties to salt and water stress tolerance, both in terms of performance (commercial production) compared to other commercial characters and variety without grafting. Different physiological mechanisms explain the tolerance to stress, such as the ability to maintain the water potential through an osmotic adjustment, stimulation of the antioxidant system, exclusion II | or retention of toxic ions (Na + and Cl -) in saline in the roots and the maintenance of photosynthesis which allows to maintain the metabolic functions of grafted plants and production. III | RESUMENEl pimiento es una hortaliza de extraordinaria importancia económica y social en nuestro país. Lamentablemente, la persistente explotación del suelo, el monocultivo y la intensificación de los procesos de producción, conducen al desarrollo de enfermedades del suelo. Esto unido a los estreses abióticos, principalmente la salinidad de las aguas y del suelo, temperaturas subóptimas y estrés hídrico, puede inducir la aparición de fisiopatias en el pimiento como el Blossom-end rot (BER) y cracking o rajado, inducir senescencia vegetal y disminuir no solo la producción, sino también la calidad del producto.La salinidad y la escasez de agua son unos los mayores problemas medio ambientales a los que tienen que hacer frente los cultivos en el área Mediterránea. Un modo de sortear los estreses bajo el prisma de un manejo integrado o ecológico del cultivo, es la utilización de plantas injertadas como estrategia de adaptació...

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“…Pesquisas acerca de respostas fisiológicas de plantas sob deficiência hídrica utilizam freqüentemente osmólitos artificiais adicionados ao substrato por meio de soluções nutritivas, uma vez que estas substâncias permitem fixar um determinado potencial da água no meio por tempo indeterminado, o que não pode ser reproduzido pela interrupção natural da irrigação (ZEKRI;PARSONS, 1990). Um dos principais osmólitos empregados nesses casos é o polietileno glicol ou PEG (AHMAD; JAVED; ASHRAF, 2007;FALTENOVICH;WELBAUM, 2008;KOCHEVA et al, 2007;ZHAO et al, 2006). O PEG consiste em um polímero de óxido de etileno de cadeia longa (C 2n+2 H 4n+6 O n+2 ), inerte e não iônico, comercializado em diferentes pesos moleculares (STEUTER; MOZAFAR; GOODIN, 1981), cuja ação é atribuída ao bloqueio da absorção de água e conseqüente dessecação da planta (LAWLOR, 1970).…”

Section: Introductionunclassified

Fisiologia da produção de mudas cítricas sob deficiência hídrica

Girardi¹

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Campos de Araújo, da UNESP/FCAV, pela disponibilização de parte dos equipamentos necessários à condução dos trabalhos experimentais e pelas sugestões para análise dos resultados. Ao colega Alessandro Rodrigues e seus familiares, pela amizade verdadeira que nasceu. À Bióloga Andréia Dias Brandão, pelo bom humor e apoio indispensável na bancada do laboratório, e a seu marido Ricardo pela paciência e gentileza nas dicas de informática. Aos Engenheiros Agrônomos Dr. Juan Sinforiano Delgado Rojas e Dra. Sílvia Blumer, respectivamente pelo auxílio na condução dos testes preliminares envolvendo método de Granier e pela utilização do equipamento de medição de fotossíntese. Aos colegas da Pós-Graduação João Paulo Campos de Araújo, Antônio Clarete, Sérgio Tapparo, Rafael Vivian, Vanderlei Antônio Stefanuto e Bruno, pelas colaborações de bancada. A todos os professores do Departamento de Produção Vegetal da ESALQ, representados pelo Dr.

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Contribution of mineral nutrition to the response of barley seedlings to polyethylene glycol–induced mild water stress

Cited by 6 publications

References 33 publications

Molecular cytogenetic identification of a wheat‐Aegilops geniculata Roth spontaneous chromosome substitution and its effects on the growth and physiological responses of seedlings to osmotic stress

Molecular cytogenetic identification of a wheat‐Aegilops geniculata Roth spontaneous chromosome substitution and its effects on the growth and physiological responses of seedlings to osmotic stress

Screening Pepper Genotypes to Obtain Tolerant Rootstocks to Salt and Water Stress: Physiological and Agronomical Responses of the Grafted Plants

Fisiologia da produção de mudas cítricas sob deficiência hídrica

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