Boron in fruit crops: plant physiology, deficiency, toxicity, and sources for fertilization

Botelho, Renato Vasconcelos; Müller, Marcelo Marques Lopes; Umburanas, Renan Caldas; Laconski, James Matheus Ossacz; Terra, Maurilo Monteiro

doi:10.1016/b978-0-323-90857-3.00015-1

Cited by 3 publications

(2 citation statements)

References 48 publications

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“…Appropriate boron level can promote pollen germination and pollen tube elongation. Inappropriate concentration, formula, and application timing and method can cause deficiency, ineffectiveness or toxicity [ 35 , 36 ]. In this study, 0.01% boric acid spray negatively affected fruit set, suggesting that the acidic form in such concentration might not be a beneficial practice at full bloom, although it effectively promoted pollen germination and elongation in the in vitro study [ 23 , 24 ].…”

Section: Discussionmentioning

confidence: 99%

Horticultural Practices in Early Spring to Mitigate the Adverse Effect of Low Temperature on Fruit Set in ‘Lapins’ Sweet Cherry

Ediger

Sharifi

2023

Plants

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Yield of sweet cherry (Prunus avium L.) is determined by fruit set, a developmental stage sensitive to variable spring environmental conditions. To sustain fruit production and enhance crop climate resilience, it is important to understand the impacts of abiotic stresses and the effectiveness of horticultural mitigations in the spring on the critical developmental processes during fruit set. In this study, flowering phenology, pistil browning and percent fruit set of ‘Lapins’ were monitored at five sites of different elevation and frost risk in the Okanagan Valley, British Columbia, Canada, in 2019 and 2022. At Site 1 in Summerland Research and Development Centre (“SuRDC1”), where a ‘Lapins’ on Krymsk 5 planting was located in a frost pocket where the crops were exposed to high risk of cold damage in the spring, a series of experiments were conducted to investigate the floral organ viability and percent fruit set under low temperatures, and under the effects of four spring horticultural mitigation measures. Installation of polyethylene sleeves and FAME spray (fatty acid methyl esters-based plant growth regulator, WAIKEN, SST Australia) were implemented in 2019; boric acid spray and postponed irrigation were tested in 2022. Low fruit set at SuRDC1 in both years was associated with severe pistil browning after night temperature dropped below −4 °C in late April. In 2019, the semi-enclosure of polyethylene sleeves led to an increase in the surface temperature (Tsurfae) of floral buds by 2–4 °C, which prolonged the stage of first bloom, delayed petal fall and prevented frost damage on pistils, but led to the decrease in percent fruit set by 77%, due to ovule abortion or cessation of fruitlet development. The early and late sprays of FAME had no significant influence on either abundance of germinated pollen tubes or percent fruit set; however, the potential of late spray in improving pollen abundance and reducing pistil browning requires further investigation. In 2022, the spray of 0.01% boric acid solution led to a decrease in fruit set by 6.95%. Six-week postponement of irrigation starting from full bloom decreased soil moisture, but increased soil temperature and improved fruit set by 7.61%. The results improved our understanding about the damages of adverse spring air temperatures on pistils and ovules, and suggested the potential of irrigation adjustment in regulating soil moisture and temperature and improving fruit set in the cool and moist spring.

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Section: Discussionmentioning

confidence: 99%

Horticultural Practices in Early Spring to Mitigate the Adverse Effect of Low Temperature on Fruit Set in ‘Lapins’ Sweet Cherry

Ediger

Sharifi

2023

Plants

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“…Boron is especially immobile in most plant tissues and does not readily move from the different parts of the tree to the buds, where it is necessary for pollen production, growth of the pollen tube, and other reproductive functions (Botelho et al, 2022). Hence, in this work, we examined the physiology of the impact of preflowering boron application on the initial set and early fruit growth coupled with a transcriptome and metabolomic analysis using the sweet cherry as an experimental model, which yields insight into the metabolic network associated with boron nutrition in fruit biology.…”

Section: Introductionmentioning

confidence: 99%

Boron stimulates fruit formation and reprograms developmental metabolism in sweet cherry

Michailidis¹,

Bazakos

Kollaros

et al. 2023

Physiologia Plantarum

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Boron modulates a wide range of plant developmental processes; however, the regulation of early fruit development by boron remains poorly defined. We report here the physiological, anatomical, metabolic, and transcriptomic impact of pre‐flowering boron supply on the sweet cherry fruit set and development (S1–S5 stages). Our findings revealed that endogenous boron content increased in early growth stages (S1 and S2 stages) following preflowering boron exogenous application. Boron treatment resulted in increased fruit set (S1 and S2 stages) and mesocarp cell enlargement (S2 stage). Various sugars (e.g., fructose and glucose), alcohols (e.g., myo‐inositol and maltitol), organic acids (e.g., malic acid and citric acid), amino acids (e.g., valine and serine) accumulated in response to boron application during the various developmental stages (S1–S5 stages). Transcriptomic analysis at early growth (S1 and S2 stages) identified boron‐responsive genes that are mainly related to secondary metabolism, amino acid metabolism, calcium‐binding, ribosome biogenesis, sugar homeostasis and especially to photosynthesis. We found various boron‐induced/repressed genes, including those specifically involved in growth. Several heat shock proteins displayed distinct patterns during the initial growth in boron‐exposed fruit. Gene analysis also discovered several putative candidate genes like PavPIP5K9, PavWAT1, PavMIOX, PavCAD1, PavPAL1 and PavSNRK2.7, which could facilitate the investigation of the molecular rationale underlying boron function in early fruit growth. Substantial changes in the expression of numerous transcription factors, including PavbHLH25, PavATHB.12L, and PavZAT10.1,.2 were noticed in fruits exposed to boron. The current study provides a baseline of information for understanding the metabolic processes regulated by boron during sweet cherry fruit early growth and fruit development in general.

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Biofortification of mungbean (Vigna radiata L. (Wilczek)) with boron, zinc and iron alters its grain yield and nutrition

Dhaliwal

Sharma

Shukla

et al. 2023

Sci Rep

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Mungbean [Vigna radiata L. (Wilczek)] is considered as an extremely nutritious crop possessing a high level of micronutrients, but their low bioavailability in the crop leads to micronutrient malnutrition in humans. Therefore, the present study was conducted to investigate the potential of nutrients viz. boron (B), zinc (Zn) and iron (Fe) biofortification on productivity, nutrient concentration and uptake as well as the economics of mungbean cultivation. In the experiment, the various combinations of RDF with ZnSO4.7H2O (0.5%), FeSO4.7H2O (0.5%) and borax (0.1%) were applied to mungbean variety ML 2056. The combined foliar application of Zn, Fe and B was highly efficient in increasing the yield of grain as well as straw in mungbean exhibiting maximum values i.e. 944 kg ha−1 and 6133 kg ha−1, respectively. Similar results for B, Zn and Fe concentration in grain (27.3 mg kg−1, 35.7 mg kg−1 and 187.1 mg kg−1, respectively) and straw (21.1 mg kg−1, 18.6 mg kg−1 and 376.1 mg kg−1, respectively) of mungbean were observed. Also, uptake of Zn and Fe by grain (31.3 g ha−1 and 164.4 g ha−1, respectively), as well as straw (113.7 g ha−1 and 2295.0 g ha−1, respectively), was maximum for the above treatment. Whereas, the B uptake was found to enhance significantly through the combined application of B, Zn and Fe, where the values 24.0 g ha−1 and 128.7 g ha−1 corresponded to grain and straw, respectively. Thus, combined use of ZnSO4.7H2O (0.5%) + FeSO4.7H2O (0.5%) and borax (0.1%) significantly improved the yield outcomes, the concentration of B, Zn and Fe, uptake and economic returns of mungbean cultivation to alleviate the B, Zn and Fe deficiency.

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Boron in fruit crops: plant physiology, deficiency, toxicity, and sources for fertilization

Cited by 3 publications

References 48 publications

Horticultural Practices in Early Spring to Mitigate the Adverse Effect of Low Temperature on Fruit Set in ‘Lapins’ Sweet Cherry

Horticultural Practices in Early Spring to Mitigate the Adverse Effect of Low Temperature on Fruit Set in ‘Lapins’ Sweet Cherry

Boron stimulates fruit formation and reprograms developmental metabolism in sweet cherry

Biofortification of mungbean (Vigna radiata L. (Wilczek)) with boron, zinc and iron alters its grain yield and nutrition

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