Germination studies in<i>Horwoodia dicksoniae</i>Turril

Suleiman, M. K.; Zaman, S.; Al-Dossery, S.; Thomas, Rini Rachel; Jacob, S.

doi:10.1080/00207230902859978

Cited by 5 publications

(3 citation statements)

References 5 publications

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“…Similar studies on native plants of Kuwait showed that untreated seeds of Haloxylon salicornicum resulted in the highest germination rate (86 %) compared to the treated ones (using Gibberellic acid and heat methods), which varied in germination (44-76 %) (Almulla, 2014). Additionally, in agreement with our findings, Nitraria retusa, a native perennial shrub, demonstrated that untreated seeds needed 55 days to achieve 79% of germination, whereas treatments considerably quicker (Gibberellic acid) allowed them to achieve 91% of germination in just 20 days (Suleiman et al, 2008). On the other hand, some untreated native seeds resulted in very low germination (55 %) due to the deep-dormancy cycles (Suleiman et al 2011a).…”

Section: Planting Seedlings For Revegetationsupporting

confidence: 90%

“…Experiments have been carried out on direct seeding to restore desert habitats along with breaking seed dormancy techniques (Suleiman et al, 2009;Suleiman et al, 2011a;Suleiman et al, 2011b;Bhatt and Pérezgarcía, 2016;Almulla et al, 2017;Bhatt et al, 2020). On the other hand, growing plants from collected seeds or clippings in nurseries before transplanting them to the restoration site is known as using seedlings.…”

Section: Introductionmentioning

confidence: 99%

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Seedling Evaluation of Native Perennials for Implementing Large-scale Revegetation Projects in Arid Lands

Abdullah,

Al-Ali

et al. 2024

Catrina: The International Journal of Environmental Sciences

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Understanding seedling development and germination processes is crucial for the successful planning and execution of revegetation and restoration initiatives on a large scale. Due to shifting environmental conditions, monitoring seed viability, dormancy, and germination success in the wild is challenging. This study seeks to investigate the optimal germination conditions for seedlings from five distinct wild populations of perennial plants commonly used in local restoration and revegetation projects in Kuwait. Kuwait has a desert climate with summer temperatures that can get as high as 46°C and minimal annual precipitation (< 112 mm). Kuwait's dry climate is home to a restricted range of flora, most of which are desert shrubs that have adapted to the severe weather. Among the well-known perennials studied at The Public Authority of Agriculture Affairs and Fish Resources (PAAF) nurseries in Kuwait were Rhanterium epapposum, Farsetia aegyptia, Calligonum comosum, Panicum turgidum, and Pennisetum divisum. In a controlled greenhouse setting, seedling germination experiments were conducted under consistent environmental conditions. The seeds were obtained from well-developed mother plants, washed, thoroughly dried, and stored in a cold, dry environment without undergoing any dormancy-breaking treatments. As a result, all five species were able to exhibit a high rate of germination, and the proportion of seedlings that emerged between 37 and 55 days ranged from 78.2 % for Pennisetum divisum producing the fewest seedlings, while Farsetia aegyptia produced the most 95.4%. This study provides essential information to land restoration managers for them to implement appropriate strategies and achieve good results for large-scale revegetation projects. However, to determine seedling growth and establishment in revegetated sites, an active ecological monitoring technique is required.

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Section: Planting Seedlings For Revegetationsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Seedling Evaluation of Native Perennials for Implementing Large-scale Revegetation Projects in Arid Lands

Abdullah,

Al-Ali

et al. 2024

Catrina: The International Journal of Environmental Sciences

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“…Sunflower is extensively cultivated as landscape plants and for cut flowers. Introduction of ornamental plants is essential to diversify an urban landscape (Suleiman et al, 2009). Dwarf cultivars which permit layering by height across the landscape are commercially significant in a wide variety of landscape plant species, including sunflower.…”

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confidence: 99%

Sunflower ‘Sunspot’ is Hyposensitive to GA3 and has a Missense Mutation in the DELLA Motif of HaDella1

Best

Wang

Brittsan

et al. 2016

J. Amer. Soc. Hort. Sci.

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Gibberellins (GAs) are phytohormones that regulate plant height and flowering time in plants. Plants with reduced GA or disrupted in GA signaling exhibit a dwarf phenotype. DELLA proteins are transcriptional repressors that attenuate GA-mediated promotion of plant growth. Alleles in which the eponymous DELLA motif in these proteins is disrupted result in constitutive repression of GA signaling and a dominantly inherited dwarf phenotype. We found that the dwarf Helianthus annuus (sunflower) cultivar Sunspot is hyposensitive to GA3 as compared with the tall cultivar Mammoth Grey. Sequencing of the HaDella1 gene indicates that ‘Sunspot’ has a single nucleotide polymorphism resulting in a missense mutation in the DELLA motif as compared with ‘Mammoth Grey’ and the reference sequence. Helianthus annuus has five genes encoding DELLA proteins, including HaDella1. We propose that the DELLA motif alteration in the HaDella1 gene results in a dominant mutation in ‘Sunspot’ and is the cause of its dwarf phenotype.

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Germination studies inHorwoodia dicksoniaeTurril

Cited by 5 publications

References 5 publications

Seedling Evaluation of Native Perennials for Implementing Large-scale Revegetation Projects in Arid Lands

Seedling Evaluation of Native Perennials for Implementing Large-scale Revegetation Projects in Arid Lands

Sunflower ‘Sunspot’ is Hyposensitive to GA3 and has a Missense Mutation in the DELLA Motif of HaDella1

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