Índices de seleção para identificar cultivares de soja tolerantes à seca

Cabral, Rogério do Carmo; Maekawa, Simone Cândido Ensinas; Zuffo, Alan Mário; Steiner, Fábio

doi:10.33448/rsd-v9i7.3812

Cited by 2 publications

(1 citation statement)

References 24 publications

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“…Drought is one of the major constraints of agricultural productivity worldwide, particularly in arid and semiarid areas, where demand for water is high (Cabral, Maekawa, Zuffo, & Steiner, 2020;Cechin, Corniani, Fumis, & Cataneo, 2010). It is also one of the most critical environmental stresses for global food security, since water is a major factor of production.…”

Section: Introductionmentioning

confidence: 99%

Use of selenium to increase antioxidant activity and water use efficiency in arugula (Eruca vesicaria ssp. Sativa) exposed to drought stress

Mangarotti

Rezende

Saath

et al. 2020

RSD

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Environmental stress can directly or indirectly affect the formation of reactive oxygen species. Oxidative stress damages cell constituents such as carbohydrates, lipids, nucleic acids and proteins, reducing plant growth, respiration and photosynthesis. In recent decades, evidence has shown that small doses of selenium act as an antioxidant and plant biostimulant, promoting growth and improving resistance to abiotic stress such as drought. As such, the aim of this study was to assess the effect of selenium foliar feeding (0, 150 and 300 ppm) on the antioxidant activity, water use efficiency and yield traits of arugula grown with and without drought stress (50% and 100% ETc) in a protected environment. A randomized block design was used, with a 2x3 factorial scheme and four repetitions. Antioxidant activity increased in treatments with 150 ppm of fertilizer and exposure to drought stress. Plants in these treatments obtained higher water use efficiency, yield and leaf area values than those not submitted to drought stress.

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Section: Introductionmentioning

confidence: 99%

Use of selenium to increase antioxidant activity and water use efficiency in arugula (Eruca vesicaria ssp. Sativa) exposed to drought stress

Mangarotti

Rezende

Saath

et al. 2020

RSD

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Selected Indices to Identify Water-Stress-Tolerant Tropical Forage Grasses

Zuffo

Steiner

Aguilera

et al. 2022

Plants

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Periods of soil water stress have been recurrent in the Cerrado region and have become a growing concern for Brazilian tropical pasture areas. Thus, the search for forage grasses more tolerant to water stress has intensified recently in order to promote more sustainable livestock. In a greenhouse experiment, the degree of water stress tolerance of nine tropical forage grass cultivars was studied under different soil water regimes. The investigation followed a 9 × 3 factorial design in four randomized blocks. Nine cultivars from five species of perennial forage grasses were tested: Urochloa brizantha (‘BRS Piatã’, ‘Marandu’, and ‘Xaraés’), Panicum maximum (‘Aruana’, ‘Mombaça’, and ‘Tanzânia’), Pennisetum glaucum (‘ADR 300’), Urochloa ruziziensis (‘Comum’), and Paspalum atratum (‘Pojuca’). These cultivars were grown in pots under three soil water regimes (high soil water regime—HSW (non-stressful condition), middle soil water regime—MSW (moderate water stress), and low soil water regime—LSW (severe water stress)). Plants were exposed to soil water stress for 25 days during the tillering and stalk elongation phases. Twelve tolerance indices, including tolerance index (TOL), mean production (MP), yield stability index (YSI), drought resistance index (DI), stress tolerance index (STI), geometric mean production (GMP), yield index (YI), modified stress tolerance (k1STI and k2STI), stress susceptibility percentage index (SSPI), abiotic tolerance index (ATI), and harmonic mean (HM), were calculated based on shoot biomass production under non-stressful (YP) and stressful (YS) conditions. Soil water stress decreased leaf area, plant height, tillering capacity, root volume, and shoot and root dry matter production in most cultivars, with varying degrees of reduction among tropical forage grasses. Based on shoot biomass production under controlled greenhouse conditions, the most water-stress-tolerant cultivars were P. maximum cv. Mombaça and cv. Tanzânia under the MSW regime and P. maximum cv. Aruana and cv. Mombaça under the LSW regime. P. maximum cv. Mombaça has greater adaptability and stability of shoot biomass production when grown under greenhouse conditions and subjected to soil water stress. Therefore, this forage grass should be tested under field conditions to confirm its forage production potential for cultivation in tropical regions with the occurrence of water stress. The MP, DI, STI, GMP, YI, k2STI, and HM tolerance indices were the most suitable for identifying forage grass cultivars with greater water stress tolerance and a high potential for shoot biomass production under LSW regime.

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Índices de seleção para identificar cultivares de soja tolerantes à seca

Cited by 2 publications

References 24 publications

Use of selenium to increase antioxidant activity and water use efficiency in arugula (Eruca vesicaria ssp. Sativa) exposed to drought stress

Use of selenium to increase antioxidant activity and water use efficiency in arugula (Eruca vesicaria ssp. Sativa) exposed to drought stress

Selected Indices to Identify Water-Stress-Tolerant Tropical Forage Grasses

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