Studies on Seed Germination and Seedling Growth of Silybum marianum (L.) Gaertn under Water-Deficit Stress Conditions

Jain, Milan

doi:10.18782/2320-7051.7236

Cited by 2 publications

(2 citation statements)

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“…Drought stress can interrupt or cease cell stretching, this is due to the decrease in turgor pressure in plant tissues [21]. Growth reduction was also observed by Sahay [22] in mustard seedlings (Brassica Juncea L.) and also by Jain [23] in milk thistle (Silybum marianum (L.) Gaertn) under water stress.…”

Section: Discussionmentioning

confidence: 67%

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

Nóbrega

Silva

Bezerra

et al. 2022

Braz. arch. biol. technol.

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This study evaluate the effect of drought and heat stress on the quality of C. spectabilis seeds. A completely randomized design in a 4×4 factorial scheme, referring to four osmotic potentials based on Polyethylene glycol (PEG 6000 = 0.0, -0.2, -0.4 and -0.8 MPa) and four temperatures (25, 30 and 35 ºC constant and alternating between 25-35 ºC), with four replications of 50 seeds per plot was used. The germination percentage, first count germination, germination speed index, average germination time, average germination speed, length and dry mass of the root, shoot and seedlings were evaluated. C. spectabilis is sensitive to drought stress during germination and seedling establishment, tolerating up to -0.2 MPa. The physiological quality of seeds is reduced with the decrease of osmotic potentials. The temperature range between 25 and 30 ºC are the one that provide better conditions for the germination of the seeds of this species.

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Section: Discussionmentioning

confidence: 67%

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

Nóbrega

Silva

Bezerra

et al. 2022

Braz. arch. biol. technol.

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“…The base, optimal and ceiling temperatures for germination of S. marianum seeds are reported to be 2.7, 18 and 40.3°C, respectively (Nadjafi, Tabrizi, Shabahang, & Mahdavi‐Damghani, 2009), whereas in another study the corresponding temperatures were 5.19, 24.01 and 34.32°C, respectively (Parmoon, Moosavi, Akbari, & Ebadi, 2015). Other factors such as smoke increased the germination percentage of S. marianum seeds at 25°C under a 16/8 h light/dark photoperiod (Abdollahi, Mehrshad, & Moosavi, 2011), but water stress decreased germination of non‐dormant seeds of S. marianum (Jain & Puri, 2018). In nearly all the above‐mentioned studies, except for temperature during seed storage (which was around 20–25°C), other conditions for seed after‐ripening (seed moisture content and storage period) were not defined.…”

Section: Introductionmentioning

confidence: 99%

Variation in seed dormancy and germination among populations of Silybum marianum (Asteraceae)

monemizadeh

Ghaderi–Far

Sadeghipour

et al. 2021

Plant Species Biology

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Milk thistle (Silybum marianum) is a medicinal plant; however, lack of consistency in past dormancy studies has hindered propagation of this species from seeds. We tested the germination responses of freshly harvested and after‐ripened (stored for 2 and 7 months; 25°C at 50% relative humidity) seeds from three populations (P1, P2 and P3) in Iran at varying constant or alternating temperatures, with or without GA3 and in light and continuous darkness. No germination occurred in freshly harvested seeds incubated at any condition without GA3 application, indicating that all the seeds were dormant. Seeds from P1 and P2, which developed under relatively dry, warm conditions, germinated over a wider range of temperatures after 2 months of dry storage, indicating type 6 of non‐deep physiological dormancy (PD). Seeds from P3, which developed under relatively wet, cool conditions, incubated at constant temperatures (especially on GA3), exhibited an increase in maximum temperature for germination, indicating type 1 of non‐deep PD. Light improved germination of after‐ripened seeds, and GA3 application substituted for the light requirement for germination. This is the first report that environmental conditions during seed development may be correlated with differences in the type of non‐deep PD. We conclude that milk thistle seeds are positively photoblastic and photodormant and the germination responses of after‐ripened seeds from different populations are different under darkness. Therefore, the impacts of genetic differences and maternal effects on the induction of dormancy during seed development should be considered in attempts to domesticate this medicinal plant.

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Studies on Seed Germination and Seedling Growth of Silybum marianum (L.) Gaertn under Water-Deficit Stress Conditions

Cited by 2 publications

References 0 publications

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

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

Variation in seed dormancy and germination among populations of Silybum marianum (Asteraceae)

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