Seed germination and seedling emergence of Iberian starthistle (<i>Centaurea iberica</i>)

Nosratti, Iraj; Abbasi, Rabee; Bagheri, A.; Bromandan, Pardis

doi:10.1111/wbm.12128

Cited by 10 publications

(7 citation statements)

References 25 publications

(26 reference statements)

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“…Similarly, Uysal et al (2006) identified that 16/8 h of light/dark at 25 °C produced better results than 8/16 h of light/dark applications in C. tomentella. Furthermore, Nosratti et al (2017a) reported that in C. iberica, the highest germination percentage was recorded at varying temperatures of 15/25 °C and 16/8 h of light/dark conditions. They also stated that light had a stimulating effect on seeds when compared to constant dark conditions.…”

Section: Determination Of Seed Germination Performances At Different ...mentioning

confidence: 99%

Seed propagation, adaptation to cultivation conditions, determination of ornamental plant properties, and ex situ conservation of the endemic species Centaurea hermannii F. Hermann

Yücel

2021

BioRes

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This study focused on seed propagation and ex situ conservation of the endemic species Centaurea hermannii F. Hermann. Plant properties such as vegetation cycle, adaptation to the cultivation environment, morphological characteristics of the plants and seeds, and esthetic properties as an ornamental variety were investigated. The percentage of viability of the seeds, as well as the effects of different seed germination methods when applied to the germination speed, were also explored. C. hermannii specimens planted in soil adapted quickly under field conditions and flowered over a period of two months, with a bright-orange color and glossy blossoms. In addition, the plants displayed all the type-specific botanical and esthetic properties, as well as provided value as an ornamental plant. An ex situ conservation area was created with the plants collected. To determine the best germination conditions for C. hermannii seeds, various methods were explored. Among these, a combination of 200 ppm of GA3 treatment during a three-month storage period at 4 °C, followed by cold-wet stratification at 4 °C for three months, produced the best results in terms of mean percentage germination (70.5 %) and mean germination speed (3 days).

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Section: Determination Of Seed Germination Performances At Different ...mentioning

confidence: 99%

Seed propagation, adaptation to cultivation conditions, determination of ornamental plant properties, and ex situ conservation of the endemic species Centaurea hermannii F. Hermann

Yücel

2021

BioRes

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“…; Nosratti et al . ). The temperature controls the capacity and rate of germination by affecting the seed dormancy status and the rate of the enzymatic activities (Bewley et al .…”

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confidence: 97%

Asian spiderflower (Cleome viscosa) germination ecology in southern Iran

Elahifard¹,

Derakhshan²

2018

Weed Biology and Management

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Cleome viscosa is one of the most important weeds of warm-season crops in southern Iran. Laboratory experiments were conducted to assess the impact of environmental factors on seed germination of C. viscosa. Freshly harvested seeds exhibited dormancy that was relieved (>90%) after immersion for 20 min in concentrated sulfuric acid. Regardless of the temperature regime, the final percentage of germination in light/dark (69.3%) was significantly higher than in complete darkness (58.3%). The optimum temperature for germination was 35/25 C in both light and dark. No germination was observed at constant temperatures of either 15 or 45 C. The thermal thresholds for seed germination, the base (T b ) and the mean ceiling germination temperatures (T c(50) ) were estimated to be 18.8 and 39.9 C, respectively. A base water potential (Ψ b(50) ) of −0.96 MPa was identified for C. viscosa seeds. The response threshold of C. viscosa to reduce 50% of maximum germination for salinity was estimated to be 255 mM. Seeds that were placed on the soil surface had the highest percentage of seedling emergence (77.3%), and no seedlings emerged from seeds placed at a depth of 6 cm. The findings of this study could help to improve the integrated weed management strategies for this species.

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“…In this study, seeds were unable to emerge from deeper soil layers indicating inversion tillage can be a weed management strategy under heavy infestation. Small seeded weeds like turnip weed fails to emerge as the carbohydrate reserve may not support the seedling growth through the soil profile [ 14 , 39 ]. Results are in agreement with the similar studies carried out in other broadleaf weeds [ 14 , 39 ].…”

Section: Discussionmentioning

confidence: 99%

Germination ecology of turnip weed (Rapistrum rugosum (L.) All.) in the northern regions of Australia

2018

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In Australia, turnip weed has been rapidly emerging as one of the major weeds in conservation agricultural systems. Germination and emergence of turnip weed were examined for two populations collected from Gatton and St George regions of Australia; two locations with high and low rainfall, respectively. The seeds of turnip weed germinated at all the tested temperatures, but germination was the lowest at 15/5°C, intermediate at 20/10°C and highest at 25/15°C and 30/20°C. The results indicated a high adaptability of turnip weed to warm environmental conditions, although it is a major problem in the winter season. Germination was higher in dark than light/dark regimes except at 30/20°C. Three was a concomitant reduction in germination as the osmotic potential values decreased from 0 to -1.0 MPa. There was 2 and 4% germination at -0.8 MPa for Gatton and St George populations, respectively, and no germination occurred at an osmotic potential of -1.0 MPa. There was a reduction in germination when the sodium chloride (NaCl) concentration was increased from 0 to 150 mM, and no germination was observed at 200 and 250 mM of NaCl. Turnip weed germinated over a broad range of pH (4 to 10). Seedling emergence was higher at 1 cm depth compared to 0.5 cm or at the soil surface. There was 28 and 33% emergence at the surface for the Gatton and St George populations, respectively, compared to 48 and 56% emergence from 1 cm depth for the Gatton and St George populations, respectively and no emergence was observed from 6 cm depth. The results indicated that tillage leading to shallow burial would promote the emergence of turnip weed; on the contrary, tillage that could bury seeds deep into the soil profile might minimise the emergence. Under ideal conditions and lack of integrated weed management programmes, this weed will emerge, set seeds and enrich the soil seed bank and thereby continue to be a problem in the northern grain region of Australia.

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Seed germination and seedling emergence of Iberian starthistle (Centaurea iberica)

Cited by 10 publications

References 25 publications

Seed propagation, adaptation to cultivation conditions, determination of ornamental plant properties, and ex situ conservation of the endemic species Centaurea hermannii F. Hermann

Seed propagation, adaptation to cultivation conditions, determination of ornamental plant properties, and ex situ conservation of the endemic species Centaurea hermannii F. Hermann

Asian spiderflower (Cleome viscosa) germination ecology in southern Iran

Germination ecology of turnip weed (Rapistrum rugosum (L.) All.) in the northern regions of Australia

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