Temperature and mechanical scarification on seed germination of 'maguey' (Agave salmiana Otto ex Salm-Dyck)

Peña-Valdivia, Cecilia B.; Sánchez-Urdaneta, Adriana Beatriz; Trejo, Carlos; Cárdenas, Elizabeth

doi:10.15258/sst.2006.34.1.06

Cited by 20 publications

(22 citation statements)

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“…marginata , with one of the larger mean seed biomass (11 mg), had the lowest maximum seed water uptake (105%) at -0.03 MPa (Figures 1A, 2B and 5). Differences in maximum seed water uptake among species (Figure 2B) were partly similar to those found by Peña-Valdivia et al [2] for three A. salmiana genotypes with different seed sizes. We suggest that this result might be evidence for differences in seed water permeability among Agave species.…”

Section: Discussionsupporting

confidence: 88%

“…Germination phases I and II for the seven species (Figure 1) were similar to those of dried mature seeds of several A. salmiana genotypes [2]. Differences of initial seed water uptake in phase I under maximum water availability (Figure 2A) show that A. cupreata , which originates from a sub-humid climate (838 mm annual mean precipitation; Table 2), imbibed more water than species from arid and semi-arid climates (340–361 mm of precipitation) i.e.…”

Section: Discussionmentioning

confidence: 75%

“…The lack of dormancy in several Agave species and genotypes has been documented [1, 2], as well as the high reproductive effort expressed by semelparity and the production of a huge amount of seeds by a single plant [28]. In contrast, most Agave species in field conditions predominantly present asexual reproduction [29].…”

Section: Discussionmentioning

confidence: 99%

“…The agave plant is described as a monocarpic perennial monocot that produces an inflorescence only once towards the end of its long life cycle. Each plant produces several hundred seeds and it has been demonstrated for a number of Agave species and genotypes that a large proportion of these seeds are viable [1, 2]. Agave plants reproduce both sexually and asexually, but they commonly propagate asexually via rhizomes and bulbils in the wild [3]; this propagation favours successful seedling establishment by initial dependence on the mother plant.…”

Section: Introductionmentioning

confidence: 99%

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Seed germination of Agave species as influenced by substrate water potential

et al. 2014

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BackgroundPlants of Agave spp. perform Crassulacean acid metabolism (CAM) and are highly drought-tolerant, but little is known concerning seed germination under low water availability. The aim of this study was to assess the effect of substrate water potential (ΨW) on seed germination and contrast hydrotime parameters of seven valuable and commercially-important Agave species from different geographical distributions and climatic regions of Mexico. Our hypothesis was that seed germination of Agave species is not affected by low water availability independently of seed biomass and the climate of their distribution area.ResultsSeed germination (at 25°C and in the dark) between 85 and 100% for all species occurred within 80–180 h at -0.03 MPa and 250–430 h at -1.0 MPa. Seed germination at -1.5 MPa declined to less than 50% (p < 0.05) for A. asperrima and A. cupreata but did not change significantly for A. americana var. marginata, A. lechuguilla and A. striata, although they showed the lowest mean base water potential (-2.01 to -2.64 MPa). Seed germination of 40% Agave species, from arid and semi-arid climates in this study, was not affected by the lower ΨW.ConclusionGermination of seeds of Agave species is moderately affected by low water availability, is partially dependent of their ecological distribution, and is independent of seed mass.

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Section: Discussionsupporting

confidence: 88%

Section: Discussionmentioning

confidence: 75%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Seed germination of Agave species as influenced by substrate water potential

et al. 2014

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“…En el caso de H. perotensis, independientemente del tipo de latencia, la proporción de este tipo de semillas cambió significativamente entre las recolectas y notablemente no existió en la muestra recolectada en 2015. Este resultado podría deberse al efecto de factores diversos y variados, tanto intrínsecos de la planta y sus estructuras, como de los ambientales durante su desarrollo y maduración, y a la interacción de ellos, como se ha observado en otras especies silvestres (Peña-Valdivia et al, 2006). La calidad menor de las semillas recolectadas en 2012 respecto a las de 2015, parece estar relacionada con la escasa precipitación (menos a 1.03 mm mensuales) durante nueve meses previos a las recolectas; en contraste, la precipitación antes de la recolección de 2015 fue más abundante, frecuente y regular.…”

Section: Discussionunclassified

Viabilidad y germinación de semillas de Hechtia perotensis (Bromeliaceae)

Elizalde

García

Peña-Valdivia

et al. 2016

RBT

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Endemic populations of Hechtia perotensis have been described in Puebla and Veracruz, Mexico. Good quality seed collections can be used in conservation, research and ecological restoration. To evaluate seed quality of wild and endemic species, some compounds are used as effective promoters of germination, such as potassium nitrate (KNO3) and gibberellic acid (AG3), because they increase seed germination capacity and reduce latency. The triphenyl tetrazolium chloride (tetrazolium) test correlates seed viability because it is based on the activity of dehydrogenases in live tissues that catalyze mitochondrial respiration. The objective of this study was to obtain information on size and weight of capsules and seeds and seed germination and viability of H. perotensis, collected in Veracruz in the year 2012 and 2015. The hypotheses were 1) that seed germination and viability are independent of the year of collection, 2) that there is a tetrazolium concentration that can identify seed viability better than others, and 3) that pretreatment with KNO3 or AG3 improves seed germination. Seed germination was assessed using a completely randomized design with three treatments (control and the germination promoters 0.2 % KNO3 and 500 mg/L AG3), four treatments for the viability test (control, 0.2, 0.5 and 1.0 % of tetrazolium) and six replicates for each treatment. A total of one hundred seeds for germination experiments, and 25 seeds for the viability test were used. The results between and within years were analyzed with ANOVA and multiple comparison with the Tukey test. The proportion of non-germinated seeds was quantified along with the number of normal and abnormal seedlings, seeds with viable embryo, seeds without embryo, and seeds with low or no viability. On average, for the 2012 collected sample, 36 % had viable embryos, 7 % had low viability, 24 % were not viable and 33 % had no embryo. This result was significantly different from the 2015 sample, for which 87 % of seed showed viable embryos, 10 % had low viability, 0 % was not viable and 3 % had no embryo. Seed germination was also significantly different between years (22 and 92 %) Pregerminative treatments did not improve germination. Seed germination and viability of H. perotensis significantly varied between years of seed collection.

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