Boron deficiency and toxicity altered the subcellular structure and cell wall composition architecture in two citrus rootstocks

Wu, Xiuwen; Lu, Xiaopei; Riaz, Muhammad; Yan, Lei; Jiang, Cuncang

doi:10.1016/j.scienta.2018.04.057

Cited by 25 publications

(19 citation statements)

References 40 publications

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“…It has been proven that plant roots are affected by B deficiency as a result of the role of B in cell wall construction (Dell and Huang, 1997;Marschner, 1995). Similar results have also been reported for the roots of other citrus (Li et al, 2016;Mei et al, 2016;Zhou et al, 2014Zhou et al, , 2015Wu et al, 2018). Further plant anatomical investigations of the roots of citrus (Li et al, 2016;Mei et al, 2016;Zhou et al, 2015) suffering from B starvation stress have been performed, and these results indicated that the root cell and vessel walls were thickened under B deficiency conditions.…”

Section: Discussionsupporting

confidence: 82%

“…In woody plants, including citrus, Bdeficient trees usually exhibit two key visible symptoms: necrosis of growing points (root tip, bud, flower, and young leaf) and deformity of organs (root, shoot, leaf, and fruit) (Wang et al, 2015). Further studies have suggested that the effects of B deficiency on plant growth may be realized through the B functioning in the cell wall and membrane, and that B deficiency results in damage to vascular tissues and suppression of both B and water transport (Dell and Huang, 1997;Wang et al, 2015;Wu et al, 2018).…”

mentioning

confidence: 99%

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Physiological and Nutritional Responses of ‘HB’ Pummelo [Citrus grandis (L.) Osbeck ‘Hirado Buntan’] to the Combined Effects of Low pH Levels and Boron Deficiency

Zhou¹,

Li²,

Chen³

et al. 2020

horts

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Soil acidification and boron (B) starvation are two dominant abiotic stress factors impacting citrus production in the red soil region of southern China. To evaluate the combined effects of low pH and B deficiency on plant growth, gas exchange parameters, and the concentrations of B and other mineral nutrients, ‘HB’ pummelo seedlings were treated under B deficiency (0 μM H3BO3) or adequate B (23 μM H3BO3) conditions at various low pH levels (4.0, 5.0, and 6.0). The seedlings were grown with modified half-strength Hoagland’s solution under greenhouse conditions for 12 weeks. Plant biomass, leaf area, seedling height, and root traits were remarkably inhibited by low pH and B deficiency stresses, and these parameters were extremely reduced with the decrease in pH levels. After 12 weeks of treatment, typical stress symptoms associated with B deficiency in citrus leaf were observed, with more severe symptoms observed at pH 4.0 and 5.0 than at pH 6.0. Leaf gas exchange parameter measurements showed that leaf photosynthesis was significantly inhibited under both low pH and B-deficient conditions. Notably, the lower the pH level, the greater the inhibition under both normal and deficient B conditions. Further investigations of the mineral nutrient concentrations showed that under both low pH and B deficiency, the concentrations of B and other mineral nutrients were influenced remarkably, particularly at pH 4.0 and 5.0. The physiological and nutritional results of the ‘HB’ pummelo seedlings indicated that low pH can exacerbate the effects of B deficiency to a certain extent.

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Section: Discussionsupporting

confidence: 82%

mentioning

confidence: 99%

Physiological and Nutritional Responses of ‘HB’ Pummelo [Citrus grandis (L.) Osbeck ‘Hirado Buntan’] to the Combined Effects of Low pH Levels and Boron Deficiency

Zhou¹,

Li²,

Chen³

et al. 2020

horts

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show abstract

“…As detailed below, B is essential for the stability of the cell wall due to the ability of B to bridge pectic polysaccharide rhamnogalacturonans, even though there is increasing evidence for a possible role of B in several alternative metabolic processes. B toxicity causes a reduction of plant growth, fruit yield and fruit quality, although the degree of tolerance can significantly differ at inter- (Keren and Bingham 1985;Papadakis et al 2003;Landi et al 2013b) and intraspecific level (Sotiropoulos et al 2006;Cervilla et al 2007;Ardic et al 2009;Landi et al 2013aLandi et al , 2014Pardossi et al 2015;Wu et al 2018). The effects of B toxicity are also dependent on the ability of a plant species to re-translocate B within the phloem.…”

Section: Introductionmentioning

confidence: 99%

Boron toxicity in higher plants: an update

Landi

Margaritopoulou

Papadakis

et al. 2019

Planta

169

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“…However, citrus is very sensitive to B deficiency and its major growing regions contain low levels of soluble B (Guidong et al, 2011;Wang et al, 2014Wang et al, , 2016. Many studies focused on citrus response to B deficiency or toxicity (Sheng et al, 2009;Boaretto et al, 2011;Mei et al, 2011;Liu et al, 2013;Zhou et al, 2014;Dong et al, 2016;Wu et al, 2018), and the molecular mechanisms for rootstock B-utilizing efficiency (An et al, 2012;Cañon et al, 2013;Zhou et al, 2015;Martínez-Cuenca et al, 2019). In the citrus industry, on the other hand, foliar application of B is an alternative way to supply B because foliar B sprays can be easily applied and may be rapidly absorbed by the foliage.…”

Section: Introductionmentioning

confidence: 99%

Foliar Supplied Boron Can Be Transported to Roots as a Boron-Sucrose Complex via Phloem in Citrus Trees

Pan

Hussain

et al. 2020

Front. Plant Sci.

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Although foliar boron (B) fertilization is regarded as an efficient way to remedy B deficiency, the mechanisms of foliar B transport from leaves to roots are still unclear. In this study, performed with 1-year-old "Newhall" navel orange (Citrus sinensis) grafted on trifoliate orange (Poncirus trifoliata) plants, we analyzed the B concentration in leaves and roots, B-sucrose complex in the phloem sap after foliar application of 10 B, girdling, and/or shading treatments. Results indicated that 10 B concentration was significantly increased in roots after foliar 10 B treatment. On the other hand, both girdling the scion stem and shading over the plants with a black plastic net significantly reduced the B and 10 B concentration in roots. LC-MS analysis revealed that foliar 10 B-treated plants had higher concentration of sucrose and some sugar alcohols in the phloem sap as compared to foliar water-treated plants. Combining with the analysis in the artificial mixture of B and sucrose, a higher peak intensity of the 10 B-sucrose complex was found in the phloem sap of foliar 10 B-treated plants compared to the control plants. Taken together, it is concluded that foliar B can be long distance transported from leaves to roots via phloem, at least by forming a B-sucrose complex in citrus plants.

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Boron deficiency and toxicity altered the subcellular structure and cell wall composition architecture in two citrus rootstocks

Cited by 25 publications

References 40 publications

Physiological and Nutritional Responses of ‘HB’ Pummelo [Citrus grandis (L.) Osbeck ‘Hirado Buntan’] to the Combined Effects of Low pH Levels and Boron Deficiency

Physiological and Nutritional Responses of ‘HB’ Pummelo [Citrus grandis (L.) Osbeck ‘Hirado Buntan’] to the Combined Effects of Low pH Levels and Boron Deficiency

Boron toxicity in higher plants: an update

Foliar Supplied Boron Can Be Transported to Roots as a Boron-Sucrose Complex via Phloem in Citrus Trees

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