Germination and tolerance of cowpea (Vigna unguiculata) cultivars to water stress

Paiva, Emanoela Pereira de; Sá, Francisco Vaniés da Silva; Torres, Salvador Barros; Brito, Marcos Eric Barbosa; Moreira, Rômulo Carantino Lucena; Silva, Luderlândio de Andrade

doi:10.1590/1807-1929/agriambi.v22n6p407-411

Cited by 8 publications

(5 citation statements)

References 9 publications

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“…These results are in agreement with those obtained by other authors studying the response of soybean seeds under water stress (Pereira et al 2015;Soares et al 2015). Water deficit also compromises seed germination in other crops, such as common bean (Paiva et al, 2018), peanut (Steiner et al, 2019), and crambe (Silva et al, 2019).…”

Section: Resultssupporting

confidence: 92%

Chemical treatment and mobilization of reserves of soybean seeds under water deficit

Catão,

Pontes,

Pinheiro

et al. 2024

J. Seed Sci.

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Seed treatments with chemical phytosanitary products can compromise mobilization of seed reserves for the seedlings under water deficit conditions. The aim of this study was to evaluate the physiological quality, the initial seedling development, and the mobilization of reserves in soybean seeds treated with phytosanitary products under water deficit. The trial was set up in a completely randomized design in a 4 × 4 factorial arrangement: chemical treatments (control, Thiamethoxam, Fludioxonil + Metalaxyl-M, and Fipronil + Pyraclostrobin + Tiophanate-methyl) × osmotic potentials (0, -0.1, -0.2, and -0.3 MPa). We analyzed the following variables: germination; hypocotyl length, root length, and total seedling length; seedling length vigor index; cotyledon dry matter weight; seedling dry matter yield; seed reserve reduction; relative dry matter yield; seed reserve reduction rate; and conversion efficiency of seed reserves into seedling dry matter. Seed quality and seedling development decline under water deficit conditions. The treatment with Fipronil + Pyraclostrobin + Thiophanate-methyl results in lower phytotoxicity. The estimated cotyledon dry matter (CDM) weight is an indicator of phytotoxicity and water deficit. Mobilization of reserves is compromised in seeds treated with insecticides, reducing the capacity of conversion of reserves into dry matter. There is an inversely proportional relationship between the reduction in conversion and the efficiency of conversion of reserves of treated soybean seeds under water deficit.

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Section: Resultssupporting

confidence: 92%

Chemical treatment and mobilization of reserves of soybean seeds under water deficit

Catão,

Pontes,

Pinheiro

et al. 2024

J. Seed Sci.

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“…In H. costaricensis seedlings, root length was reduced by water stress, and seedlings originated from seeds with pre-germination treatments also showed reduction (Table 3). Water stress reduces seed hydration, affecting the degradation of reserves and consequently the availability of energy and nutrients for radicle growth (PAIVA et al, 2018;COSTA et al, 2022).…”

Section: Resultsmentioning

confidence: 99%

Pre-germination treatments in pitaya (Hylocereus spp.) seeds for water stress mitigation

et al. 2023

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The use of mitigating agents to minimize the deleterious effects of water stress is a promising alternative for plant species, especially during germination and initial seedling development. Thus, the objective was to evaluate the effect of different pre-germination treatments as mitigating agents of water stress during germination and initial development of pitaya seedlings of the species Hylocereus undatus and H. costaricensis. The experiment was carried out in a completely randomized design, in a 2 x 6 factorial scheme, corresponding to two pitaya species and six pre-germination treatments (T1 = 0.0 MPa (control), T2 = -0.2 MPa (water stress); T3 = hydropriming + water stress; T4 = gibberellic acid + water stress; T5 = salicylic acid + water stress and T6 = thiamethoxan + water stress) with four replicates of 50 seeds. The variables analyzed were germination, germination speed index, shoot and primary root lengths, total dry mass, total soluble sugars and total free amino acids. The water potential of -0.2 MPa is limiting for germination and initial growth of H. costaricensis and H. undatus, with H. undatus being more tolerant to water stress in the germination phase. Pre-germination treatments with hydropriming, gibberellic acid, salicylic acid and thiamethoxan improve the physiological performance of H. costaricensis seeds, with gibberellic acid being the best attenuator of water stress. Gibberellic acid improves the physiological performance of H. undatus seeds under water deficit conditions.

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“…High quality seeds assume a fundamental role for production companies. Plants generally remain in the field for some time beyond their physiological maturity, exposed to environmental variations that can compromise their physiological quality (Paiva et al, 2018). One of the significant difficulties during harvest of cowpea seeds is their lack of uniform physiological maturity.…”

Section: Introductionmentioning

confidence: 99%

Cowpea yield and quality after application of desiccating herbicides

et al. 2020

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Abstract: The aim of this study was to evaluate the effects of pre-harvest desiccant herbicides on the yield and the physiological and technological quality of cowpea seeds after harvest and after storage. The experiment was conducted in a randomized block design with four replications. A split-plot design (6 × 2) was composed of the desiccant herbicides flumioxazin (30 g ai.ha-1), glufosinate ammonium (500 g ai.ha-1), paraquat (400 g ai.ha-1), saflufenacil (70 g ai.ha-1), and carfentrazone (24 g ai.ha-1) and an untreated control, as well as two seed evaluation periods, at harvest and six months after h arvest. Desiccants were applied at the R5 stage. The desiccants affected the yield, classification, color, and physiological quality of seeds of ‘BRS Guariba’. The glufosinate ammonium and paraquat herbicides compromised seed physiological quality. Flumioxazin did not affect seed yield components, color, and physiological quality. Storage at 20 °C for six months affected seed physiological quality.

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Germination and tolerance of cowpea (Vigna unguiculata) cultivars to water stress

Cited by 8 publications

References 9 publications

Chemical treatment and mobilization of reserves of soybean seeds under water deficit

Chemical treatment and mobilization of reserves of soybean seeds under water deficit

Pre-germination treatments in pitaya (Hylocereus spp.) seeds for water stress mitigation

Cowpea yield and quality after application of desiccating herbicides

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