Germination and Seedling Emergence of Three Semiarid Western North American Legumes

Bushman, B. Shaun; Johnson, Douglas A.; Connors, Kevin J.; Jones, Thomas A.

doi:10.1016/j.rama.2015.08.002

Cited by 11 publications

(7 citation statements)

References 15 publications

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“…There are few reports indicating combinational dormancy (PY + PD) in seeds of a few species of Astragalus (Pickart et al, 1992; Kaye, 1997; Eisvand et al, 2006; Meinke et al, 2013; Bushman et al, 2015, 2019; Jones et al, 2016; Kildisheva et al, 2018). Seeds of A. amphioxys required scarification of the seed coat plus ‘a period of refrigeration’ (cold stratification?)…”

Section: Resultsmentioning

confidence: 99%

“…Non-treated (intact) seeds germinated to 12%, seeds mechanically scarified with sandpaper to 20%, seeds prechilled for 3 weeks to 20% and seeds scarified plus prechilled to 35%. Physiological dormancy (PD) of the embryo may be the reason why Bushman et al (2015) obtained very low germination and seedling emergence (from soil) percentages for mechanically and acid-scarified seeds of A. filipes , although seed viability was very high. In another study, Bushman et al (2019) indicated that seedling emergence of A. filipes was higher when scarified seeds were planted in autumn than in spring and concluded that they need cold stratification for germination.…”

Section: Resultsmentioning

confidence: 99%

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A meta-analysis of the effects of treatments used to break dormancy in seeds of the megagenusAstragalus(Fabaceae)

Soltani

Baskin

et al. 2020

Seed Sci. Res.

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Astragalus is the largest genus of seed plants with 3000 or more species that occurs naturally on several continents. The genus has some use as a forage and medicine and in industry, and many of the species are rare endemics threatened with extinction. The seeds are reported to be dormant at maturity, and various treatments have been used in an attempt to germinate them. Our primary aim was to determine via a meta-analysis the most effective way(s) to break dormancy in seeds of this species-rich genus. Mechanical and chemical (conc. sulphuric acid) scarification were by far the best of 12 treatments for breaking seed dormancy of the 40 species included in our meta-analysis, whereas prechilling, gibberellin and smoke were ineffective. These results along with those of imbibition tests confirm that seeds of the examined Astragalus species have physical dormancy (PY). Further, PY in these 40 species and (its documented occurrence) in 118 species that could not be included in our meta-analysis transcends climatic and geographic boundaries, edaphic conditions, life cycle/life form types and infrageneric phylogeny. Thus, it seems likely that most species of Astragalus have PY. However, in addition to PY, physiological dormancy (PD), that is, combinational dormancy (PY + PD), has been reported in a few species of Astragalus. This study should be useful to both basic and applied scientists who want to germinate seeds of Astragalus.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

A meta-analysis of the effects of treatments used to break dormancy in seeds of the megagenusAstragalus(Fabaceae)

Soltani

Baskin

et al. 2020

Seed Sci. Res.

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“…The highest moisture content recorded for Astragalus garbancillo (Table 2) seeds indicates their greatest potential to preserve their germination power for longer periods of time in relation to the dry season in the Andean region, in fact, we associate this feature with the shorter length of the hilar fissure compared to Lupinus species (Figure 5C, 6B, and 7B). Additionally, we know of the influence of factors such as soil depth and its composition on the germination of especially hard cover seeds, such as Fabaceae seeds, and that they can effectively plan the establishment of species in projects of ecological restoration projects [32].…”

Section: Discussionmentioning

confidence: 99%

The Role of the Internal Structure of Fabaceae Seeds in the Processes of Dormancy and Germination

Jara-Peña¹,

Marín-Bravo²

2023

Production and Utilization of Legumes - Progress and Prospects

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The germination processes of Fabaceae seeds are well studied based on physiological parameters. However, in many cases, especially in wild seeds, there is a predominance of dormancy processes that must be reversed to finally produce germination, generally applying scarification processes. In the anatomical studies of seeds, a certain conformation of the structure of the cover is appreciated, with a predominance of sclerenchymatic tissues and waxy covers that are the cause of the difficulty of the entry of water to produce the imbibition of the seed. Mechanical or chemical scarifications are usually recommended to produce effective scarification. The characterization of the anatomical details of the seed coat allows us to predict the appropriate scarification technique with which optimal seed germination can be obtained.

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“…Chemical composition, consumption, selectivity and performance of Guzerá and Girolando heifers in Caatinga, rainy season, Serra Talhada-PE. (Dittus & Muir, 2010;Bushman et al, 2015), low vigor seedlings resulting in slow establishment (Chandra, 2009), low seed productivity (Fischer et al, 2015), pod dehiscence and low persistence under continuous stocking, especially of very palatable legumes in relation to grasses less sought after by grazing animals (Muir et al, 2011). The domestication of unpalatable legumes (Nisi et al, 2015), for example, containing condensed tannins (Cooper et al, 2014) or less accessible, may contribute to the persistence of rangeland legume biodiversity (Nisi et al, 2015).…”

Section: Use Of Legumes In the Ruminant Foodmentioning

confidence: 99%

Value of endemic legumes for livestock production on Caatinga rangelands

Muir¹,

Santos

Cunha

et al. 2019

Agraria

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Rangelands and other native pastures occupy a large area of the planet, with greater temporal and spatial botanical composition and productivity variability. Despite the continuous and historical use of these areas, including overgrazing and fire exclusion, endemic legume species persist in some semiarid rangelands. The objective this work was to review current knowledge of legume use, especially those of the Brazilian Caatinga rangeland. Studies that measure the qualitative and quantitative variations of native legumes are essential for ruminant feed supplementation, to the sustainability of animal production, as well as for economic and environmental improvements in rangelands. Caatinga vegetation of northeastern Brazil consists of deciduous shrubs and small trees which mostly lose their leaves at the beginning of the dry season. The legume family contributes to the greatest number of endemic species but little is known about their productivity or nutritive values. Livestock select Orelha de onça [Macroptilium martii (Benth.) Marechal & Baudet] and Mororó (Bauhinia cheilantha (Bong.) Steud.) and these should, during rangeland clearing, be preserved. In addition, although Caatinga legumes have great crude protein content, their biological fixation of atmospheric N has yet to be thoroughly studied. On the negative side, some native Caatinga legumes have great levels of neutral detergent fiber-bound N (NDFN) and condensed tannin. As a result, animal performance in Caatinga is often poor, notably in the dry period. Forage legumes also provide several environmental services such as N input via BNF and rehabilitation of degraded land.

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Germination and Seedling Emergence of Three Semiarid Western North American Legumes

Cited by 11 publications

References 15 publications

A meta-analysis of the effects of treatments used to break dormancy in seeds of the megagenusAstragalus(Fabaceae)

A meta-analysis of the effects of treatments used to break dormancy in seeds of the megagenusAstragalus(Fabaceae)

The Role of the Internal Structure of Fabaceae Seeds in the Processes of Dormancy and Germination

Value of endemic legumes for livestock production on Caatinga rangelands

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