Effects of Trichoderma asperellum on Germination Indexes and Seedling Parameters of Lettuce Cultivars

Souza, Renato Santos de; Moraes, Mariana Poll; Paraginski, João Antônio; Moreira, Thainá Fogliatto; Bittencourt, Karina Chertok; Toebe, Marcos

doi:10.1007/s00284-021-02713-4

Cited by 6 publications

(3 citation statements)

References 40 publications

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“…The relationship between the germination rate and digestion time was further confirmed through in vitro simulated digestion. The viability of ungerminated seeds, germination index, and vitality index all supported the germination rate, providing additional insights into the effects of digestion on the seeds [30,31].…”

Section: Seed Germination Behavior After Simulated Digestionmentioning

confidence: 77%

Understanding the Impact of Sheep Digestion on Seed Germination in the Cold Desert Annual Diptychocarpus strictus with Emphasis on Fruit and Seed Heteromorphism

Zhao,

Wang,

Cao

et al. 2024

Life

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This study aimed to investigate the morphological characteristics of fruits and seeds from Diptychocarpus strictus, a plant species inhabiting the cold desert pastoral area of China. Furthermore, this study sought to evaluate the germination potential of these seeds following digestion by sheep. This study employed the sheep rumen fistula method to simulate rumen digestion at various time intervals. Subsequently, an in vitro simulation method was utilized to simulate true gastric and intestinal digestion after rumen digestion. Paper germination tests were then conducted to assess the impact of the digestive process on the heteromorphic seed morphology and germination. During rumen digestion, the seeds were protected by wide wings. The results revealed a highly significant negative correlation (p < 0.01) between seed wing length and digestion time. Post-rumen digestion, variations in the germination rate among seeds from fruits at different locations were observed. Indicators, such as germination rate, exhibited a highly significant negative correlation with rumen digestion time (p < 0.01). In vitro simulated digestion tests demonstrated that Diptychocarpus strictus seeds retained their ability to germinate even after complete digestion within the livestock’s digestive tract. The polymorphic nature of Diptychocarpus strictus seeds, coupled with their capacity to survive and germinate through the digestive tract, facilitates the spread of these seeds. This finding has implications for mitigating desert grassland degradation and promoting sustainable ecological development.

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Section: Seed Germination Behavior After Simulated Digestionmentioning

confidence: 77%

Understanding the Impact of Sheep Digestion on Seed Germination in the Cold Desert Annual Diptychocarpus strictus with Emphasis on Fruit and Seed Heteromorphism

Zhao,

Wang,

Cao

et al. 2024

Life

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“…Germination vigor (GV) was recorded on day 4, and germination percentage (GP) on day 9 [40]. Germination index (GI) [41] and vitality index (VI) [42] were calculated as detailed below. The time taken to achieve 50% of germination (T50) was calculated following the method of Agacka-Mołdoch [43].…”

Section: Measurementsmentioning

confidence: 99%

Seed osmopriming with polyethylene glycol (PEG) enhances seed germination and seedling physiological traits of Coronilla varia L. under water stress

Ma,

Wei,

Han

et al. 2024

PLoS ONE

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Water stress can adversely affect seed germination and plant growth. Seed osmopriming is a pre-sowing treatment in which seeds are soaked in osmotic solutions to undergo the first stage of germination prior to radicle protrusion. Seed osmopriming enhances germination performance under stressful environmental conditions, making it an effective method to improve plant resistance and yield. This study analyzed the effect of seed osmopriming with polyethylene glycol (PEG) on seed germination and physiological parameters of Coronilla varia L. Priming treatments using 10% to 30% PEG enhanced germination percentage, germination vigor, germination index, vitality index, and seedling mass and reduced the time to reach 50% germination (T50). The PEG concentration that led to better results was 10%. The content of soluble proteins (SP), proline (Pro), soluble sugars (SS), and malondialdehyde (MDA) in Coronilla varia L. seedlings increased with the severity of water stress. In addition, under water stress, electrolyte leakage rose, and peroxidase (POD) and superoxide dismutase (SOD) activities intensified, while catalase (CAT) activity increased at mild-to-moderate water stress but declined with more severe deficiency. The 10% PEG priming significantly improved germination percentage, germination vigor, germination index, vitality index, and time to 50% germination (T50) under water stress. Across the water stress gradient here tested (8 to 12% PEG), seed priming enhanced SP content, Pro content, and SOD activity in Coronilla varia L. seedlings compared to the unprimed treatments. Under 10% PEG-induced water stress, primed seedlings displayed a significantly lower MDA content and electrolyte leakage than their unprimed counterparts and exhibited significantly higher CAT and POD activities. However, under 12% PEG-induced water stress, differences in electrolyte leakage, CAT activity, and POD activity between primed and unprimed treatments were not significant. These findings suggest that PEG priming enhances the osmotic regulation and antioxidant capacity of Coronilla varia seedlings, facilitating seed germination and seedling growth and alleviating drought stress damage, albeit with reduced efficacy under severe water deficiency.

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“…At the end of each exposure duration, the initial germination percentage was calculated by the equation: B/(C − NV) × 100%, where B is the number of seeds germinated in salt solutions and C is the total number of seeds (30 seeds), and NV is the non-viable ungerminated seeds. Germination rate was calculated using the modified Timson index: ∑G/t × 100%; in this study G is the accumulate germination percentage at each day and t is the total germination period [28]. According to this equation, the highest value obtained was 100 (i.e., 1000/10), and a higher value indicates a more rapid germination.…”

Section: Effects Of Salinity and Exposure Duration On Initial Germina...mentioning

confidence: 99%

Germination Strategy of Chenopodium acuminatum Willd. under Fluctuating Salinity Habitats

Tian,

Li,

Zhang

et al. 2023

Agronomy

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Germination events of plants often occur after rainfall in saline environments where the soil salinity is diluted, viz recovery germination. Previous germination studies have rarely considered the duration of exposure to salt stress, and none of them have investigated recovery germination under low-salt concentration, other than in distilled water. The main objective of this study was to investigate the effects of salinity, exposure duration and low-salt recovery solutions on seed germination of the weed Chenopodium acuminatum to get a clear insight about the germination strategy exhibited by this species in a saline habitat. Seeds were initially exposed to 0–400 mM NaCl for 10, 20 and 30 d. The subsequent recovery experiment was conducted differently. For those initially treated with 100 and 200 mM NaCl, the recovery solution was distilled water, while for those initially treated with 300 and 400 mM NaCl, the recovery solution was distilled water, at 50 and 100 mM NaCl. Results showed that the recovery germination percentage and rate significantly decreased when the exposure duration extended. Seeds could subsequently recover to germinate at high percentages at recovery salt solution concentrations for a short duration, but the recovery percentages and rates in high salinity, combined with high exposure duration and relatively high recovery salt concentrations, were remarkably lower. More than 30% of the ungerminated seeds were viable after the recovery experiment. We suggest that Ch. acuminatum exhibits a ‘cautious’ strategy of germination to avoid injury from long-term salt stress and ensure survival for the subsequent continuation of its population under unfavorable saline conditions.

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Effects of Trichoderma asperellum on Germination Indexes and Seedling Parameters of Lettuce Cultivars

Cited by 6 publications

References 40 publications

Understanding the Impact of Sheep Digestion on Seed Germination in the Cold Desert Annual Diptychocarpus strictus with Emphasis on Fruit and Seed Heteromorphism

Understanding the Impact of Sheep Digestion on Seed Germination in the Cold Desert Annual Diptychocarpus strictus with Emphasis on Fruit and Seed Heteromorphism

Seed osmopriming with polyethylene glycol (PEG) enhances seed germination and seedling physiological traits of Coronilla varia L. under water stress

Germination Strategy of Chenopodium acuminatum Willd. under Fluctuating Salinity Habitats

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