Determination and equilibration of seed moisture content (SMC) and seed storage of black wattle (Acacia mearnsii) seed for gamma irradiation

Beck, S.L.; Fossey, Annabel; Dunlop, Robert W.

doi:10.15258/sst.2006.34.3.11

Cited by 2 publications

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“…The invasive potential of commercially farmed Acacia species could be substantially reduced by inducing sterility through gamma radiation of seed or the production of triploids through chromosome doubling techniques. Flowering in plants grown from irradiated seed can be significantly reduced (Beck et al. , 2006; Beck & Fossey, 2007), and tetraploid A. mearnsii plants have been developed (Beck et al.…”

Section: Management Tactics and Practicesmentioning

confidence: 99%

National‐scale strategic approaches for managing introduced plants: insights from Australian acacias in South Africa

Wilgen¹,

Dyer²,

Hoffmann³

et al. 2011

Diversity and Distributions

163

184

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Aim A range of approaches and philosophies underpin national‐level strategies for managing invasive alien plants. This study presents a strategy for the management of taxa that both have value and do harm. Location South Africa. Methods Insights were derived from examining Australian Acacia species in South Africa (c. 70 species introduced, mostly > 150 years ago; some have commercial and other values; 14 species are invasive, causing substantial ecological and economic damage). We consider options for combining available tactics and management practices. We defined (1) categories of species based on invaded area (a surrogate for impact) and the value of benefits generated and (2) management regions based on habitat suitability and degree of invasion. For each category and region, we identified strategic goals and proposed the combinations of management practices to move the system in the desired direction. Results We identified six strategic goals that in combination would apply to eight species categories. We further identified 14 management practices that could be strategically combined to achieve these goals for each category in five discrete regions. When used in appropriate combinations, the prospect of achieving the strategic goal will be maximized. As the outcomes of management cannot be accurately predicted, management must be adaptive, requiring continuous monitoring and assessment, and realignment of goals if necessary. Main conclusions Invasive Australian Acacia species in South Africa continue to spread and cause undesirable impacts, despite a considerable investment into management. This is because the various practices have historically been uncoordinated in what can be best described as a strategy of hope. Our proposed strategy offers the best possible chance of achieving goals, and it is the first to address invasive alien species that have both positive value and negative impacts.

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Section: Management Tactics and Practicesmentioning

confidence: 99%

National‐scale strategic approaches for managing introduced plants: insights from Australian acacias in South Africa

Wilgen¹,

Dyer²,

Hoffmann³

et al. 2011

Diversity and Distributions

163

184

View full text Add to dashboard Cite

show abstract

Application of gamma irradiation on morphological, biochemical, and molecular aspects of wheat (Triticum aestivum L.) under different seed moisture contents

Kiani

Borzouei²,

Ramezanpour

et al. 2022

Sci Rep

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Nuclear technology is currently used as a tool in mutation breeding to improve crops by increasing genetic variation. The ionization of gamma rays produces large amounts of free radicals, simulating stressors in the natural environment. To avoid gamma-ray-induced oxidative stress, plants use antioxidant defense systems. Exposure of plants to irradiation can affect the germination, growth, and production of metabolites. Plants' sensitivity to irradiation depends on genetic and environmental factors such as moisture content. For this purpose, the effects of different gamma irradiation doses [0, 100, 200, 300, and 400 Gray (Gy)] and different seed moisture contents (7, 13, and 19%) on traits such as seed germination, seedling growth, molecular and biochemical alterations in antioxidant enzymes were examined in the current study. Based on the results, the highest seed germination percentage was observed in the interaction effect of seed moisture at 13% with an irradiation dose of 400 Gy (98.89%). Seedling survival percent and seedling length decreased with increasing doses of gamma irradiation at different seed moisture contents. Increasing gamma irradiation doses were reduced root and stem fresh and dry weight, and root and stem length. The highest level of catalase enzyme activity and expression was observed at 200 and 300 Gy irradiation doses at different moisture contents. The peroxidase and polyphenol oxidase gene expression were reduced at all contents of gamma irradiation doses and seed moisture compared to the control. It can be concluded that the dose of 200–300 Gy of gamma irradiation reduced plant growth by 30% in terms of fresh and dry weight and length of plants, as well as enhanced the expression of antioxidant enzymes. The results of this study could help plant breeders select an appropriate dose rate in wheat for further research.

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Determination and equilibration of seed moisture content (SMC) and seed storage of black wattle (Acacia mearnsii) seed for gamma irradiation

Cited by 2 publications

References 0 publications

National‐scale strategic approaches for managing introduced plants: insights from Australian acacias in South Africa

National‐scale strategic approaches for managing introduced plants: insights from Australian acacias in South Africa

Application of gamma irradiation on morphological, biochemical, and molecular aspects of wheat (Triticum aestivum L.) under different seed moisture contents

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