Physiological Response of Seeds of Crotalaria spectabilis under Drought and Heat Stress

Nóbrega, Jackson Silva; Silva, Lucy Gleide da; Bezerra, Ana Carolina; Bruno, Riselane de Lucena Alcântara; Souto, Antônio Gustavo de Luna; Silva, Toshik Iarley da

doi:10.1590/1678-4324-2022220145

Cited by 4 publications

(4 citation statements)

References 20 publications

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“…However, the reduction of the osmotic potential negatively affects the mobilization of stored reserves, the structural organization of proteins, the activity of phytohormones, in addition to increasing oxidative stress, due to the toxic effect of ions in the solution (Ibrahim, 2016). Sunflower (Helianthus annuus L.) and Crotalaria spectabilis Roth seeds under water stress (Carneiro et al, 2011;Nóbrega et al, 2022) showed a reduction in germination and vigor with osmotic potentials below -0.20 MPa; however, the use of solutions with potential above -0.20 Mpa did not affect germination, which remained around 90%.…”

Section: Resultsmentioning

confidence: 99%

ELECTRICAL CONDUCTIVITY AND OSMOTIC CONDITIONING WITH POLYETHYLENE GLYCOL IN STORAGE Caryocar brasiliense SEEDS

Lacerda

Pagehú

Gonçalves

et al. 2023

Rev. Agric. Neotrop.

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The propagation of Caryocar brasiliense (pequizeiro) is still little known. This study aimed to evaluate different osmotic conditions with polyethylene glycol (PEG) in the imbibition process and in the germination of pequi seeds, in addition to verifying the electrical conductivity to evaluate the viability of these seeds. The experiment was conducted with freshly dispersed pyrenes and with pyrenes stored for 90 days. The electrical conductivity of the aqueous solution was measured every six hours for up to 48 hours, using five replications with 20 seeds. The extracted seeds were placed in PEG solutions with osmotic potentials: 0.0; −1.0; −2.0; −3.0; −4.0 MPa, monitored at intervals of 12 hours to 60 hours, plus additional treatment with dry seeds without any type of imbibition. The design was completely randomized with four replications of 25 seeds for germination and four replications of ten seeds for monitoring water content during imbibition. Germination percentage, germination speed index (GSI), percentage of dead and live seeds at 40 days were evaluated. In seeds with longer storage time, the electrical conductivity was higher. Treatments that were not submitted to PEG showed higher GSI, lower mortality percentage and higher germination percentage with 40% and 37%, respectively. The electrical conductivity test was adequate.

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Section: Resultsmentioning

confidence: 99%

ELECTRICAL CONDUCTIVITY AND OSMOTIC CONDITIONING WITH POLYETHYLENE GLYCOL IN STORAGE Caryocar brasiliense SEEDS

Lacerda

Pagehú

Gonçalves

et al. 2023

Rev. Agric. Neotrop.

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“…Negative effect of water deficit on germination was also observed on the vigor of C. pyramidale seeds, with decreases of 63 and 83% in the FGC and GSI values at an osmotic potential of -1.2 MPa, accentuating the effect of water stress on seed quality. Reduced water availability causes changes in germination metabolism, compromising pre-germination metabolic processes, delaying the development of the embryonic axis (Nóbrega et al, 2022).…”

Section: Discussionmentioning

confidence: 99%

“…DÉFICIT HÍDRICO (Ferreira et al, 2022). It is a species adapted to the conditions of the semi-arid Northeast of Brazil, a region characterized by high temperatures and irregular rainfall, which can compromise the germination and initial establishment of this species, since they are the most sensitive stages to stress conditions (Nóbrega et al, 2022).…”

Section: Osmocondicionamento De Sementes Com áCido Salicílico Na Indu...mentioning

confidence: 99%

Seed osmopriming with salicylic acid on induction of tolerance of Cenostigma pyramidale to water deficit

Nóbrega,

Silva,

Silva

et al. 2024

RARV

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Cenostigma pyramidale is an endemic species of Brazil, widely spread in the Caatinga biome. The conditions in the semi-arid Northeastern region of Brazil can affect the development of plants due to the irregularity of rainfall, limiting the availability of water and reducing the germination and initial growth of native species. Therefore, seed priming with salicylic acid may mitigate the effects of water stress on plants. The objective of this work was to evaluate the effect of seed osmopriming with salicylic acid as a water deficit attenuator on germination and initial growth of C. pyramidale seedlings. A completely randomized design in a 5 × 5 factorial scheme, corresponding to five osmotic potentials (Ψs – 0, -0.3, -0.6, -0.9 and -1.2 MPa) and five doses of salicylic acid (0, 0.5, 1.0, 1.5 and 2.0 mM), with four repetitions of 25 seeds, was used. Germination and initial growth of C. pyramidale were compromised by water deficit. Osmopriming of seeds with salicylic acid at a dose of 0.63 mM is an efficient strategy to reduce the effect of water deficit in the germination stage from the potential of -0.2 MPa. The vigor of C. pyramidale seeds increased under deficit conditions with the application of salicylic acid, with the concentration varying from 0.5 to 1.0 mM. Osmopriming seeds with 0.87 mM salicylic acid promotes the development of vigorous seedlings under water deficit conditions.

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“…Okcu [57] in the study investigating the effects of different salt concentrations on germination and seedling development in forage cowpeas at doses of 0-270 mM, stated that the germination rate varied between 30.20 and 98.60%, and the highest value was determined in the control group, while the highest average germination time varied between 2.00 and 3.36 days, and reported that germination times were determined at concentrations of 210, 240, and 270 mM. Nóbrega et al [58] have found a shoot length of 7.46 cm and a root length between 2.68 and 3.14 cm without any implementation. Ates and Tekeli [48] determined the germination rate on day seven at 100,00%, 100.00%, and 7.17% at 0 mM, 100 mM, and 150 mM in three different Persian clover lines, respectively.…”

Section: Discussionmentioning

confidence: 99%

Macro-Mineral Uptake, Relative Water Content, Retention Capability, and Tolerance Index of Sunn Hemp (Crotalaria juncea L.) under Salinity Stress at Early Seedling

Demiroğlu Topçu,

Tenikecier,

Ateş

2024

Agronomy

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Salt stress exerts adverse effects on yield by inhibiting or delaying seed germination and impeding seedling growth. Additionally, different salt concentrations have adverse effects on plant wet and dry weight and stem and shoot development. Crotalaria juncea L., the fastest-growing species within the Crotalaria genus, demonstrates a high degree of adaptability to both tropical and subtropical climates. To assess the tolerance of sunn hemp to salinity during the germination and early seedling stages, several indicators were determined at different (0, 50, 100, 150, 200, 250, and 300 mM) salt concentrations. Germination was conspicuously absent at salt concentrations of 250 mM and 300 mM. Notably, seedling characteristics, such as shoot length, root length, root fresh weight, seedling fresh weight, retention capability of the shoot, and the relative water content, experienced adverse effects with escalating salt concentrations. Intriguingly, the apex of seedling and root dry weights manifested at the pinnacle of salt concentration at 200 mM. Despite the discernible influence of heightened salt concentrations during the nascent seedling stage, the tolerance index was quantified at 100 mM, 150 mM, and 200 mM. Analyzing the study results through the lens of macro-minerals revealed an augmentation in Na and Cl content concomitant with increasing salt concentrations.

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Physiological Response of Seeds of Crotalaria spectabilis under Drought and Heat Stress

Cited by 4 publications

References 20 publications

ELECTRICAL CONDUCTIVITY AND OSMOTIC CONDITIONING WITH POLYETHYLENE GLYCOL IN STORAGE Caryocar brasiliense SEEDS

ELECTRICAL CONDUCTIVITY AND OSMOTIC CONDITIONING WITH POLYETHYLENE GLYCOL IN STORAGE Caryocar brasiliense SEEDS

Seed osmopriming with salicylic acid on induction of tolerance of Cenostigma pyramidale to water deficit

Macro-Mineral Uptake, Relative Water Content, Retention Capability, and Tolerance Index of Sunn Hemp (Crotalaria juncea L.) under Salinity Stress at Early Seedling

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