Thermoinhibition in parsley seeds

Baldini, Luiz Felipe Guedes; Ferreira, Gisela; Nakagawa, João; Silva, Edvaldo Aparecido Amaral da

doi:10.14393/bj-v33n6a2017-37192

Cited by 2 publications

(3 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The recovery of germination after transferring the seeds to an optimum temperature (20°C) supports the notion that thermoinhibition rather than thermodormancy was the underlying phenomenon, as reported for several cultivated species (e.g. Bouzo et al, 2007;Deng and Song, 2012;Yoong et al, 2016;da Silva et al, 2017;Derakhshan et al, 2018;Geshnizjani et al, 2018). To our knowledge, this is the first report demonstrating the existence of thermoinhibition in this species.…”

Section: Discussionsupporting

confidence: 87%

“…While the former is characterized by prolonged inhibition of germination after exposing the seeds to optimal conditions (one type of secondary dormancy acquired at supraoptimal temperatures), the second is understood as the inhibition of germination of hydrated seeds induced by exposure to HTs, which is quickly alleviated when the seeds are transferred to suitable temperatures (Kendall and Penfield, 2012;Huo et al, 2016;Derakhshan et al, 2018;Geshnizjani et al, 2018). This type of response has been reported in celery (Bouzo et al, 2007), parsley (da Silva et al, 2017), tomato (Geshnizjani et al, 2018) and rapeseed (Derakhshan et al, 2018), and it has been deeply studied in lettuce (e.g. Argyris et al, 2008;Deng and Song, 2012;Yoong et al, 2016) and Arabidopsis thaliana (Tamura et al, 2006;Toh et al, 2012;Huo et al, 2016;Yan and Chen, 2020).…”

Section: Introductionmentioning

confidence: 97%

See 1 more Smart Citation

Germination responses in Zephyranthes tubispatha seeds exposed to different thermal conditions and the role of antioxidant metabolism and several phytohormones in their control

Acosta

Manfreda²,

Alcaraz³

et al. 2022

Seed Sci. Res.

View full text Add to dashboard Cite

Zephyranthes tubispatha is an ornamental species distributed along several countries of South America. Although it can be multiplied through bulbs or scales, seed germination is a simpler and more cost-effective process. Temperature plays a major role in the control of germination; however, its effect has been scarcely investigated in this species. In the present work, we characterized the germination responses of Z. tubispatha seeds to different temperatures and analyzed the role of key components of the antioxidant metabolism and phytohormones in their control. Seeds showed an optimal temperature range for germination between 14 and 20°C, with higher temperatures (HTs) being progressively inhibitory. While germination was almost nil above 28°C, it could be recovered after transferring the seeds to 20°C, suggesting that thermoinhibition was the underlying phenomenon. The duration of the HT incubation period affected both the time to germination onset and the germination rate at 20°C. Similarly, the activity of antioxidant enzymes, the production of reactive oxygen species in the embryo and the sensitivity to some germination promoters varied depending on the duration of the HT treatment. The addition of 20 μM fluridone was sufficient to recover germination dynamics as in the control treatment when given after a long-term incubation period (25 d) at HT. Ethephon supply was more effective than gibberellins to suppress thermoinhibition, suggesting that changes in the balance and/or sensitivity to ethylene and abscisic acid over time play an important role in the regulation of germination responses to thermal cues in this species.

show abstract

Section: Discussionsupporting

confidence: 87%

Section: Introductionmentioning

confidence: 97%

Germination responses in Zephyranthes tubispatha seeds exposed to different thermal conditions and the role of antioxidant metabolism and several phytohormones in their control

Acosta

Manfreda²,

Alcaraz³

et al. 2022

Seed Sci. Res.

View full text Add to dashboard Cite

show abstract

“…Parsley seeds have slow and uneven germination (Silva, Baldini, Ferreira, Nakagawa, & Silva, 2017). A faster and more uniform germination process is important to reduce the exposure of seeds and seedlings to bad weather in fields.…”

Section: Resultsmentioning

confidence: 99%

Physiological and biochemical responses of osmo-primed parsley seeds subjected to saline stress

Manjavachi

Silva

et al. 2022

Acta Sci. Agron.

Self Cite

View full text Add to dashboard Cite

Water and salt stress conditions affect germination and seedling emergence. It is known that physiological priming can not only trigger different mechanisms to increase the speed and uniformity of germination, but also influence the antioxidant defence system of the seeds, especially in adverse conditions. In this context, the objective of this work was to evaluate the physiological seed quality and the activity of antioxidant enzymes in seeds of Petroselinum crispum induced to tolerate saline stress through osmo-priming. Seeds were placed in polyethylene glycol solutions with three osmotic potentials (-0.5, -1.0 or -1.5 MPa) for 2, 4 or 6 days. Subsequently, they were placed on substrates moistened with sodium chloride solution (NaCl), in concentrations that generated osmotic potentials of -0.2, -0.4, -0.6, -0.8 or -1.0 MPa, to germinate. The germination percentage, germination speed index, seedling length, fresh weight, dry weight and activity of the antioxidant enzymes superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) were evaluated. Germination and germination speed index decreased linearly with the increase in NaCl concentrations, indicating the species sensitivity. As for length, fresh weight and dry weight of seedlings, this effect was more expressive from the potential of -0.4 MPa. The vigour and activity of SOD, POD, and CAT enzymes were reduced in unprimed seeds, emphasising the effectiveness of the technique. The induction of tolerance to saline stress can be related to the activity of the antioxidant system observed in seeds.

show abstract

Thermoinhibition in parsley seeds

Cited by 2 publications

References 21 publications

Germination responses in Zephyranthes tubispatha seeds exposed to different thermal conditions and the role of antioxidant metabolism and several phytohormones in their control

Germination responses in Zephyranthes tubispatha seeds exposed to different thermal conditions and the role of antioxidant metabolism and several phytohormones in their control

Physiological and biochemical responses of osmo-primed parsley seeds subjected to saline stress

Contact Info

Product

Resources

About