The effects of low boron on growth, gas exchange, boron concentration and distribution of ‘Newhall’ navel orange (Citrus sinensis Osb.) plants grafted on two rootstocks

Sheng, Ou; Song, Shangwei; Peng, Shuang; Deng, Xiuxin

doi:10.1016/j.scienta.2009.02.009

Cited by 55 publications

(45 citation statements)

References 34 publications

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“…Em mamoneira, Silva et al (2008), verificaram que as plantas cultivadas na ausência de boro apresentaram menor teor de matéria seca de raízes em comparação com as demais doses testadas desse nutriente em solução nutritiva. Resultado semelhante foi observado por Sheng et al (2009), em laranjeira Newhall (Citrus sinensis (L.) Osbeck) enxertada em Poncirus trifoliata Rafin cultivada sob diferentes concentrações de boro adicionadas à solução nutritiva aplicada no substrato, em que ocorreu acréscimo na matéria seca de raízes com o aumento do boro disponível para a planta. Figura 3 -Matérias fresca e seca de raízes de plantas de copo-de-leite cultivadas sob doses de boro em solução nutritiva, após 210 dias.…”

Section: Resultsunclassified

Doses de boro no desenvolvimento de copo-de-leite em solução nutritiva

et al. 2010

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RESUMOO boro desempenha funções importantes em processos biológicos das plantas, como a síntese e estruturação da parede celular, lignificação, metabolismo e transporte de carboidratos, além de participar da divisão e diferenciação celular em tecidos meristemáticos. No entanto, as necessidades nutricionais para o cultivo de copo-de-leite, especialmente de boro, ainda são pouco conhecidas. Assim, objetivou-se avaliar os efeitos de diferentes doses de boro no crescimento e desenvolvimento, teor e acúmulo desse nutriente em plantas de copo-de-leite cultivadas em solução nutritiva. Mudas micropropagadas foram submetidas aos tratamentos com as doses de 0,05; 0,25; 0,50; 0,75; 1,00 e 2,00 mg L -1 de boro em solução nutritiva de Hoagland & Arnon diluída a 30% de sua força iônica. O delineamento experimental foi o inteiramente casualizado, com dez repetições. As plantas não manifestaram sintomas visuais de deficiência ou de toxidez de boro, no entanto, o sistema radicular das plantas cultivadas na dose de 0,05 mg L -1 de boro apresentou-se com o crescimento reduzido. A melhor dose para o desenvolvimento adequado de plantas de copo-de-leite em solução nutritiva é de 1,20 mg L -1 de boro. Termos para indexação:Zantedeschia aethiopica (L.) Spreng, micronutrientes, flor de corte. ABSTRACTBoron has essential functions in plant biological processes such as cell wall synthesis and structuralization, lignification, carbohydrates metabolism and transport. This element also acts in cell division and differentiation in meristematic tissues. However, the nutritional needs for calla lily cultivation, and especially boron needs, are still poorly known. Thus, the objective of this work was to evaluate the effects of different boron doses on growth and development, content and accumulation of boron in calla lily plants grown in a nutrient solution. Micropropagated seedlings were submitted to treatments with the doses 0.05; 0.25; 0.50; 0.75; 1.00 and 2.00 mg L -1 boron in Hoagland & Arnon nutrient solution diluted to 30% of its ionic force. The experimental design used was completely randomized blocks with ten replicates. Plants showed no visual deficiency or toxicity symptoms, however, the root system of plants cultivated in 0.05 mg L -1 boron showed reduced growth. The best development of calla lily plants was observed in 1.20 mg L -1 boron in nutrient solution. INTRODUÇÃORecomendações sobre o manejo da nutrição e adubação para o cultivo de copo-de-leite, ainda são bastante escassas, o que tem ocasionado o uso inadequado de fertilizantes, os quais têm sido aplicados em quantidades elevadas (Silberbush & Lieth, 2004) ou reduzidas, comprometendo o bom desenvolvimento e a produtividade da espécie.Nutrientes essenciais devem estar prontamente disponíveis, uma vez que possuem funções indispensáveis para o adequado crescimento e desenvolvimento das plantas. Dentre esses, o boro está envolvido em muitos dos processos fisiológicos das plantas, como a síntese e estruturação da parede celular, lignificação, metabolismo e transporte de carboid...

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Section: Resultsunclassified

Doses de boro no desenvolvimento de copo-de-leite em solução nutritiva

et al. 2010

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“…2). Several studies showed that B deficiency induced leaf structural changes including abnormal stomatal morphology and altered functionality (Oosterhuis and Zhao 2001;Rosolem and Leite 2007;Sharma and Sharma 1987;Sheng et al 2009) but the underlying mechanisms of this physiological response to B deficiency remain speculative.…”

Section: Symptoms Of Different B Root Supplymentioning

confidence: 99%

“…Physiological responses of plants to B deficiency include the loss of membrane integrity and cell wall stability, which result in the development of structural damage in crop plants like for instance, cracked stem in celery, stalk rot in cauliflower, heart rot and internal black spot in beet, top rot in tobacco and internal cork in apple (Blevins and Lukaszewski 1998). Several studies showed that B deficiency induces leaf structural changes, including abnormal stomata and distorted guard cells in cauliflower (Sharma and Sharma 1987) and coffee (Rosolem and Leite 2007) or decreased stomatal conductance and transpiration rates in navel orange and cotton (Oosterhuis and Zhao 2001;Sheng et al 2009). Many other effects associated with B imbalances have been described, but the direct role of B in metabolism is still little understood.…”

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Absorption and mobility of foliar-applied boron in soybean as affected by plant boron status and application as a polyol complex

et al. 2011

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“…[9] In citrus, boron deficiency causes leaf senescence, decreases the tree vigour and reduces the fruit yield and quality. [10,11] It also causes corky split veins to occur in mature leaves. [7,12] Roots are critical for absorption, the transport of water and mineral nutrients such as boron, the synthesis of metabolites such as auxin, etc.…”

Section: Introductionmentioning

confidence: 99%

“…[10] However, its primary and lateral root elongation is more sensitive to boron deficiency than other citrus rootstocks. [15,16] Although a relationship between boron deficiency and IAA metabolism in citrus has been hypothesized [7,15,16] and was discovered in squash, [2] sunflower, [28] pea [29] and Arabidopsis thaliana, [19] our knowledge about this relationship is still rudimentary.…”

Section: Introductionmentioning

confidence: 99%

Boron deficiency alters root growth and development and interacts with auxin metabolism by influencing the expression of auxin synthesis and transport genes

Liu

Pan

et al. 2016

Biotechnology & Biotechnological Equipment

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Boron (B) deficiency inhibits and disturbs root growth and development by interacting with auxin (indole-3-acetic acid, IAA). However, the underlying mechanism of this interaction is still poorly understood. This study found that plants in a long-term boron deprivation treatment (»0.25 mg L ¡1) had inhibited elongation of trifoliate orange roots, enlarged root tips and severe necrosis as well as a significant decrease in soluble boron and IAA content in seedling root tips. The results of a short-term boron deprivation treatment showed that a significant decrease in soluble boron and IAA content occurred after 3 hours of treatment (HOT) and 1 day of treatment (DOT), respectively. Moreover, the expression of IAA synthetic genes (TAA1, TAR2, YUC3 and YUC8) was strongly induced as early as 3 HOT and was then significantly reduced. The expression of rootward IAA transport genes (AUX1, PIN1 and PIN4) decreased significantly in the boron deprivation treatment, but the expression levels of shootward IAA transport genes (LAX1, ABCB1 and PIN3) were significantly increased. Taken together, the increase in IAA content before 1 DOT may be due to increased IAA synthesis caused by the induction of TAA1, TAR2, YUC3 and YUC8 expression; the subsequent decrease and the significantly lower final IAA content compared to the CB treatment (0.25 mg L ¡1 B) may be due to the reduced expression of IAA synthetic genes and rootward IAA transport genes and the increased expression of shootward IAA transport genes.

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The effects of low boron on growth, gas exchange, boron concentration and distribution of ‘Newhall’ navel orange (Citrus sinensis Osb.) plants grafted on two rootstocks

Cited by 55 publications

References 34 publications

Doses de boro no desenvolvimento de copo-de-leite em solução nutritiva

Doses de boro no desenvolvimento de copo-de-leite em solução nutritiva

Absorption and mobility of foliar-applied boron in soybean as affected by plant boron status and application as a polyol complex

Boron deficiency alters root growth and development and interacts with auxin metabolism by influencing the expression of auxin synthesis and transport genes

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