10Boron Is Mobile in Cowpea Plants

Abstract

Cowpea [Vigna unguiculata (L.) Walp] is cultivated in tropical and subtropical regions worldwide, but its production is usually limited by boron (B) deficiency, which can be mitigated by applying B via foliar spraying. In plants with nutrient mobility, the residual effect of foliar fertilization increases, which might improve its efficiency. An experiment was carried out to evaluate the concentration and mobility of the B isotopic tracer (10B) in different organs of cowpea plants, after the application of this micronutrient in the growing media and also to leaves. Treatments were designed based on B fertilization as follows: without B in the growth media, with 10B applied via foliar spraying (10B-L), with B in the growth media (substrate) and 10B via foliar spraying (10B-L + B-S), and with 10B in the growth media (substrate) without foliar spraying (10B-S), and a control without fertilization. A redistribution of 10B was observed in new leaves when the element was supplied via foliar spraying, resulting in greater leaf area, dry mass and dry matter production of aerial parts, and also the whole plant. 10Boron was redistributed when applied via foliar spraying in cowpea plants, regardless of the plant's nutritional status, which in turn might increase internal B cycling.

Boron Nutrition in Coffee Improves Drought Stress Resistance and, Together with Calcium, Improves Long-Term Productivity and Seed Composition

“…Leite et al [46], utilizing isotopic B labeling, provided evidence that B remobilization occurred in coffee trees, with some translocation in well-nourished plants (without B deficit), but significant phloem translocation or remobilization at a deficient supply of B, as what was reported in this research for the treatments without drought stress and without B. Olivera-Silva et al [50] demonstrated B remobilization in Cowpea (Vigna unguiculata (L). Walp), which in turn resulted in a high B accumulation and a significant increase in the dry biomass accumulation.…”

“…B acts in the biosynthesis of cell walls, assisting Ca 2+ in the deposition of pectates in cell walls. Boron also forms cis-diol-borate complexes, which are constitutional elements of the plasmalemma [50].…”

Aspectos Limitadores Para O Ensino Da Dança Nas Aulas De Educação Física

“…Segundo [15] a dança é uma atividade que proporciona vários benefícios, pois melhora a capacidade respiratória, ajuda a perder peso, fortalece os músculos e diminui as dores, além de ajudar no convívio social das pessoas.…”