Early Effects of Excess Boron on Photosynthesis and Growth of<i>Cucurbita pepo</i>

Lovatt, Carol J.; Bates, Loretta M.

doi:10.1093/jxb/35.3.297

Cited by 77 publications

(44 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Liu (2000) found that B enhanced photosynthesis efficiency of soybean by membrane maintenance and photosynthesis products translocation and Mo did by chlorophyll stability and enlarging leaf area for photosynthesis. Some studies demonstrated that B excess or deficiency resulted in a decrease of photosynthesis rates in Cucurbita pepo, citrus and sunflower leaves (Lovatt and Bates 1984, Kastori et al 1995, Papadakis et al 2004), but Sage et al (1989) reported that photosynthesis in Streptanthus morrisonii leaves are unaffected by high boron and Zhao and Oosterhuis (2003) found that in the field study, neither soil nor foliar B treatment improved cotton photosynthesis due to sufficient soil B for plant growth (0.2 and 0.3 mg/kg at two study sites). Gupta et al (1991) also observed that treatment with 2 mg/kg Mo (soil dry weight) resulted in a decrease in photosynthesis of 22% in the soybean leaves.…”

Section: Discussionmentioning

confidence: 90%

The effect of molybdenum and boron in soil on the growth and photosynthesis of three soybean varieties

Liu¹,

Yang²,

Gen-di³

et al. 2005

Plant Soil Environ.

View full text Add to dashboard Cite

This paper presents a study on growth and photosynthesis response of soybean to Mo and/or B in soil. Pot experiments were set up to examine the effect of Mo and/or B on growth and photosynthesis of three soybean varieties with four treatments (control, +Mo, +B, +[Mo + B]) at various growth stages. The study showed that Mo and/or B increased main length, system volume and dry weight of the roots, aboveground biomass, leaves' photosynthesis rate of soybean. The variation and interaction between Mo and B in soil was explored with regard to their impact on soybean growth and photosynthesis. There were some dissimilarity in growth and photosynthesis in the plants between the supplements of Mo and B in the soil, and the interrelation between Mo and B in plant and was co-supplementary to each other. Therefore, growth and photosynthesis of the soybean with Mo and B treatments were much more improved than those with Mo or B alone. Besides, some genotypic variation was found in three soybean varieties, in which Zhechun III was the most sensitive and 3811 the most tolerant plant to Mo and B.

show abstract

Section: Discussionmentioning

confidence: 90%

The effect of molybdenum and boron in soil on the growth and photosynthesis of three soybean varieties

Liu¹,

Yang²,

Gen-di³

et al. 2005

Plant Soil Environ.

View full text Add to dashboard Cite

show abstract

“…Os teores de clorofila total diminuíram a partir da dose estimada de 9,54 mg kg -1 de B (Figura 1e), o que coincidiu com o aparecimento de clorose em decorrência da toxidez causada pela dose elevada de B. Em plantas de Cucurbita pepo, um dos primeiros efeitos da toxidez por causa do excesso de B foi a redução nos teores de clorofila, o que antecedeu ao aparecimento dos sintomas visuais de toxidez (Lovatt & Bates, 1984). Figura 1.…”

Section: Resultados and Discussãounclassified

Produção e qualidade de rosas em razão de doses de boro aplicadas no substrato

Júnior

Carvalho-Zanão

Fontes

et al. 2014

Rev. Bras. Ciênc. Solo

View full text Add to dashboard Cite

RESUMOMuitos trabalhos têm demonstrado os efeitos da aplicação do boro (B) em variadas culturas; entretanto, poucos registros demonstram seus efeitos na produção de rosas. Objetivou-se com este experimento avaliar os efeitos de doses de B na produção e qualidade de rosas (Rosa hybrida cv. Shiny Terrazza ® ) em vaso. Os tratamentos foram cinco doses de B (0, 1, 4, 8 e 16 mg kg -1 ), aplicadas no substrato, em delineamento de blocos casualizados, com cinco repetições. Foram avaliados: número de flores por planta; número de folhas por haste floral; produção de matéria seca de raízes, folhas e flores; altura da planta; número de dias para o florescimento; comprimento do botão floral; e diâmetro e longevidade floral. Além disso, foram determinados os teores foliares de clorofila total e B e os sintomas de toxidez desse elemento. Verificou-se efeito significativo das doses de B na maioria das variáveis avaliadas, excetuando-se a altura das plantas, o número de flores por planta, a longevidade floral e a produção de matéria seca de raízes. O teor foliar de B aumentou linearmente em função das doses desse elemento. Houve incremento na produção e qualidade das flores com a aplicação do B, com redução do número de dias para o florescimento. Foram verificados sintomas de toxidez causado pelo B a partir da dose de 4 mg kg -1 . Esses sintomas foram caracterizados por manchas do tipo encharcamento, iniciando nas margens do limbo foliar, com essas evoluindo para clorose e posterior necrose; na maior dose ocorreu queda de folhas. Essa queda foi responsável pela diminuição do número de folhas por haste no final do ciclo, a partir da dose de 8 mg kg -1 de B. As plantas com sintomas de toxidez apresentaram teores foliares de B acima de 200 mg kg -1 , enquanto as sadias (controle), de 65 a 89 mg kg -1 .Termos de indexação: Rosa hybrida, micronutriente, ácido bórico, floricultura.

show abstract

“…In excess, it causes negative physiological effects, including reduced root cell division, decreased shoot and root growth, lower stomatal conductance (Lovatt and Bates, 1984;Nable et al, 1990), a decrease in leaf chlorophyll and inhibition of photosynthesis (Ghanati et al, 2002). The resistance to B toxicity of tolerant varieties of different plant species was shown to be related to their ability to reduce the intracellular concentration of B by active efflux from the roots, thereby maintaining a lower root B concentration (Stangoulis et al, 2001;Hayes and Reid, 2004;Reid et al, 2004Reid et al, , 2007Cervilla et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

The effects of the combination of salinity and excess boron on the water relations of tolerant tomato (Solanum lycopersicum L.) cv. Poncho Negro, in relation to aquaporin functionality

Contreras¹,

Montoya²,

Pacheco³

et al. 2011

Span. j. agric. res.

View full text Add to dashboard Cite

As elevated levels of boron (B) are accompanied by conditions of excessive salinity with drastic consequences for crops, it is crucial to find a crop that is tolerant to these conditions. In this work, the interaction between salinity and excess B with respect to aquaporin-mediated changes by blockade of mercury and water relations were studied as well as the osmotic adjustment of the plants. The treatments, for tomato 'Poncho Negro' cultivated hydroponically in a controlled environment chamber, were control (75 and 150 mM) NaCl and/or 5 mg L -1 or 20 mg L -1 B. Hydraulic conductance (L 0 ) of detached exuding root systems exhibits large variations in response to abiotic stimuli. No additive (synergic) effects of B and salinity were observed. Under salinity, the plants increased their turgor, compensating for the decrease in the leaf water potential through the reduction in the leaf osmotic potential by the accumulation of soluble sugars and proline. The involvement of Hg 2+ -insensitive aquaporins or the osmotic gradient as the main force for water flow through the apoplastic pathway must be contemplated. Finally, all the data reveal the tomato cv. Poncho Negro to be a germplasm of agronomic interest and a good alternative for cultivation areas with high content of salts and the excess B of the soil and irrigation water.Additional key words: boric acid; plant water relations; root hydraulic conductance; tomato Poncho Negro. ResumenEfectos de la combinación de salinidad y exceso de boro en las relaciones hídricas del tomate (Solanum lycopersicum L.) tolerante cv. Poncho Negro y su relación con la funcionalidad de las acuaporinas En muchas ocasiones niveles elevados de boro (B) van acompañados de condiciones de excesiva salinidad, cuyas consecuencias pueden ser drásticas para los cultivos, por lo que es fundamental encontrar variedades que puedan tolerar estas condiciones. En este trabajo, se estudió cómo la interacción entre la salinidad y el exceso de B afecta a la actividad de las acuaporinas y a las relaciones hídricas, así como al ajuste osmótico de las plantas. Se cultivó en hidroponía tomate cv Poncho Negro en una cámara de crecimiento con ambiente controlado con los tratamientos control, NaCl (75 y 150 mM) y/o B (5 ó 20 mg L -1 ). No se observó ningún efecto aditivo (sinergia) del exceso de B y la salinidad. Las plantas aumentaron su turgencia en condiciones salinas, compensando así la disminución del potencial hídrico foliar, a través de la reducción de su potencial osmótico por la acumulación de azúcares solubles y prolina. La participación de acuaporinas insensibles al Hg +2 o del gradiente osmótico, como la principal fuerza impulsora del flujo del agua, a través de la vía apoplástica, deben ser contemplados. Finalmente, todos los datos revelan que el tomate cv. Poncho Negro puede ser un germoplasma de interés agronómico y una buena alternativa para cultivar en condiciones de alto contenido de sales y exceso de B del suelo y del agua de riego.Palabras clave adicionales: acido bórico; conductanc...

show abstract

Early Effects of Excess Boron on Photosynthesis and Growth ofCucurbita pepo

Cited by 77 publications

References 0 publications

The effect of molybdenum and boron in soil on the growth and photosynthesis of three soybean varieties

The effect of molybdenum and boron in soil on the growth and photosynthesis of three soybean varieties

Produção e qualidade de rosas em razão de doses de boro aplicadas no substrato

The effects of the combination of salinity and excess boron on the water relations of tolerant tomato (Solanum lycopersicum L.) cv. Poncho Negro, in relation to aquaporin functionality

Contact Info

Product

Resources

About