Breaking seed dormancy in Opuntia rastrera from the Chihuahuan desert

Mandujano, María C.; Montaña, Carlos; Rojas-Aréchiga, Mariana

doi:10.1016/j.jaridenv.2004.10.009

Cited by 31 publications

(32 citation statements)

References 13 publications

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“…The ecological and biological characteristics of cacti that increase their vulnerability include: i) their great habit-specificity and edaphic-specialization (ValienteBanuet and Godínez-Álvarez, 2002;Zavala-Hurtado and Valverde, 2003); ii) their requirement for nursing, which provides protection against predators, increases nutrient availability and supplies shade for seedlings (CastroCepero et al, 2006;Muro-Pérez et al, 2012); iii) their slow growth rates and long reproductive periods (Nobel, 1988;Zavala-Hurtado and Díaz-Solis, 1995;Tufenkian, 1999); iv) their low seed production, seed dormancy and low-vigor seeds greatly reduce cacti density (Mandujano et al, 2005;Flores et al, 2008); and v) self-incompatibility (Boyle and Idnurm, 2001). …”

Section: Conservation Status Of Ornamental Cactimentioning

confidence: 99%

“…Additionally, a number of cacti seeds exhibit dormancy; thus, physical (mechanical abrasion, cuttings, low temperature) and chemical scarification (immersion in concentrated HCl or H 2 SO 4 acids or treatment with gibberellic acid) are employed to break seed dormancy (Rojas-Aréchiga et al, 2011). In the Opuntioideae subfamily in particular, seeds show low germination capacities and an extended period of time is required to complete germination primarily due to the structure of the ovule which consists of three integuments, the inner of which completely envelops the ovule (Mandujano et al, 2005).…”

Section: Conservation Status Of Ornamental Cactimentioning

confidence: 99%

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Tissue culture of ornamental cacti

Pérez-Molphe-Balch

Santos-Díaz

Ramírez-Malagón

et al. 2015

Sci. agric. (Piracicaba, Braz.)

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Cacti species are plants that are well adapted to growing in arid and semiarid regions where the main problem is water availability. Cacti have developed a series of adaptations to cope with water scarcity, such as reduced leaf surface via morphological modifications including spines, cereous cuticles, extended root systems and stem tissue modifications to increase water storage, and crassulacean acid metabolism to reduce transpiration and water loss. Furthermore, seeds of these plants very often exhibit dormancy, a phenomenon that helps to prevent germination when the availability of water is reduced. In general, cactus species exhibit a low growth rate that makes their rapid propagation difficult. Cacti are much appreciated as ornamental plants due to their great variety and diversity of forms and their beautiful short-life flowers; however, due to difficulties in propagating them rapidly to meet market demand, they are very often over-collected in their natural habitats, which leads to numerous species being threatened, endangered or becoming extinct. Therefore, plant tissue culture techniques may facilitate their propagation over a shorter time period than conventional techniques used for commercial purposes; or may help to recover populations of endangered or threatened species for their re-introduction in the wild; or may also be of value to the preservation and conservation of the genetic resources of this important family. Herein we present the state-of-the-art of tissue culture techniques used for ornamental cacti and selected suggestions for solving a number of the problems faced by members of the Cactaceae family.

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Section: Conservation Status Of Ornamental Cactimentioning

confidence: 99%

Section: Conservation Status Of Ornamental Cactimentioning

confidence: 99%

Tissue culture of ornamental cacti

Pérez-Molphe-Balch

Santos-Díaz

Ramírez-Malagón

et al. 2015

Sci. agric. (Piracicaba, Braz.)

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“…Since these fungi were observed growing on the testa of all germinated seeds and eroding the funiculus, the authors interpreted the resistance to germinate as a mechanical problem. This idea goes along with the commonly used methods of breaking Opuntia seed dormancy through scarification methods, which involve treatment with sulfuric acid, cold treatment and/or rubbing with sandpaper [14].…”

Section: Introductionmentioning

confidence: 99%

Endomycorrhizal Fungi and <i>Opuntia ficus-indica</i> Seed Germination on a Lunar Regolith Simulant

Konings-Dudin¹,

Butcher²,

Castor-Macías³

et al. 2014

AiM

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Endomycorrhizal fungi play an important role in the survival of plants on poor soils. Planting seeds into lunar soil at a lunar colony will be a challenge for seeds of any plant. The seeds will need a special microbial "tool kit" that will help them germinate and the young seedlings establish themselves. In this study, seeds of the prickly pear cactus, Opuntia ficus-indica, were chosen to examine the presence of fungus spores in the soil, inside the seeds and after germination in the rhizosphere, roots and other tissues of the young seedlings. The nutrient poor lunar regolith simulant JSC-1A was used as autoclaved or untreated growth medium. The mycorrhizal fungus Trichoderma viride was predominantly identified on the roots of new seedlings. This fungus also demonstrated the strongest effect on the germination rate of the seeds in comparison with other fungi isolated from the rhizosphere of Opuntia plants. T. viride was not detected within seeds and also not within seedlings, besides the root tips, whereas an arbuscular mycorrhizal Glomus species was seed-borne and present throughout most of the seedling. A close association between T. viride and a Glomus species associated with O. ficus-indica is demonstrated through light microscopic and electron microscopic images of the outside and inside root tips of the seedlings.

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“…The seeds have a hard impermeable testa which prevents imbibitions of water and germination. Therefore, the seeds seem to require treatments before sowing in order to obtain rapid, uniform and high germination rate (Huang & Gutterman, 2000;Mandujano et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Germination behaviour and seedling establishment of two desert shrubs,Calligonum polygonoides(Polygonaceae) andSpartidium saharae(Fabaceae), under experimental conditions

Derbel

Chaïeb

2007

Acta Botanica Gallica

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Abstract.-As their great importance in providing many uses and services, Calligonum polygonoides subsp. comosum (Polygonaceae) and Spartidium saharae (Fabaceae) have drawn some attention and appeared to be suitable for revegetation of desert. An experimental study has been carried out on the germinative properties of seeds these species. Analyses of pretraitment, temperature effects and water potential have enabled determination of optimum germination conditions. C. polygonoides and S. saharae developed a very strong integumental inhibition which was easily eliminated by Na hypochlorite (12 °C HL) or immersion in concentrated sulphuric acid (H 2 SO 4 , 95%) respectively. The germination capacity was significantly greater between 20 and 25 °C for both species. These results are confirmed by experiment in field. Study of water potential on germination showed that these species are able to germinate at relatively low water potentials. An understanding of these factors is crucial for successful regeneration and recruitment of these long lived desert plant species.Key words : germination -seedling -stress -desert species -Calligonum polygonoides -Spartidium saharae. Résumé.-Calligonum polygonoides subsp. comosum (Polygonaceae) etSpartidium saharae (Fabaceae) présentent un grand intérêt écologique en zone saharienne tunisienne. Elles peuvent être considérées comme candidates pour la restauration d'écosystèmes désertiques et l'amélioration du couvert végétal. Une étude expérimentale des effets de la température, de prétraitements, du stress salin et hydrique a permis de préciser les exigences germinatives de ces deux taxons. L'effet de prétraitement met en évidence l'existence d'une inhibition tégumentaire, levées par l'immersion des semences dans l'acide sulfurique (95%) et dans l'hypochlorite de sodium (12° CHL). La capacité germinative de C. polygonoides à 25 °C est significativement la plus élevée. La température optimale de germination de S. saharae est de 20 °C. Les espèces étudiées sont capables de germer à des potentiels hydriques relativement bas. La connaissance de la stratégie germinative adoptée par chaque espèce permet de mieux comprendre leur dynamique naturelle et d'améliorer l'efficacité des travaux de restauration artificielle et de la revégétalisation des écosystèmes désertiques.

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Breaking seed dormancy in Opuntia rastrera from the Chihuahuan desert

Cited by 31 publications

References 13 publications

Tissue culture of ornamental cacti

Tissue culture of ornamental cacti

Endomycorrhizal Fungi and <i>Opuntia ficus-indica</i> Seed Germination on a Lunar Regolith Simulant

Germination behaviour and seedling establishment of two desert shrubs,Calligonum polygonoides(Polygonaceae) andSpartidium saharae(Fabaceae), under experimental conditions

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Breaking seed dormancy in Opuntia rastrera from the Chihuahuan desert

Cited by 31 publications

References 13 publications

Tissue culture of ornamental cacti

Tissue culture of ornamental cacti

Endomycorrhizal Fungi and &lt;i&gt;Opuntia ficus-indica&lt;/i&gt; Seed Germination on a Lunar Regolith Simulant

Germination behaviour and seedling establishment of two desert shrubs,Calligonum polygonoides(Polygonaceae) andSpartidium saharae(Fabaceae), under experimental conditions

Contact Info

Product

Resources

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Endomycorrhizal Fungi and <i>Opuntia ficus-indica</i> Seed Germination on a Lunar Regolith Simulant