Seasonality of seed production and germination trends of Fumana ericoides (Cistaceae) in the west semiarid Mediterranean region

Llorens, Leonardo; Pons, Miguel Vadell; Gil, Lorenzo; Boira, Herminio

doi:10.1016/j.jaridenv.2007.04.004

Cited by 18 publications

(10 citation statements)

References 25 publications

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“…Warm conditions may therefore promote the reproductive ability of Parthenium by increasing seed production and the seed-fill percentage, producing seeds with the capacity to live longer in the soil seed bank. Higher temperature during seed development increases seed germinability in many species (Llorens et al 2008). According to Long et al (2008), warm temperature at the time of Parthenium seed production enables the seed once shed to persist in the soil for more than three years, whereas cool temperature permit survival for only 1 -3 years.…”

Section: Discussionmentioning

confidence: 99%

The stimulating impact of elevated temperatures on growth and productivity of <i>Parthenium hysterophorus</i> L.

Kapoor¹

2014

Egypt. J. Bio.

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Invasive alien weeds pose a great threat to biodiversity by suppressing the native flora and causing negative impacts on crop yields. Parthenium hysterophorus is an exotic weed that causes nuisance and health hazard to mankind and animals, and is a danger to the environment. Experiments were conducted during summer and winter to understand the impact of different temperature conditions on the growth of Parthenium. Pot studies conducted at 22-30 0 C temperature conditions were considered as control. During summer at 35-45 0 C, various growth parameters significantly increased in comparison to the 7-15 0 C temperature regime in winter. Different biochemical constituents were also higher in the leaves during summer than in winter season. The present investigation clearly indicates that growth and productivity of Parthenium was directly proportional to the increase in atmospheric temperature, indicating the possibility of the influence of rising temperature on its invasiveness.

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Section: Discussionmentioning

confidence: 99%

The stimulating impact of elevated temperatures on growth and productivity of <i>Parthenium hysterophorus</i> L.

Kapoor¹

2014

Egypt. J. Bio.

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“…Generally, seeds that develop and mature at warmer temperatures are less dormant at maturity than those that develop at cooler temperatures (Donohue et al, 2008, Kendall et al, 2011, Kendall and Penfield, 2012, Huang et al, 2014). Higher temperatures during seed development have been reported to increase seed germination in many species (Drew and Brocklehurst, 1990, Llorens et al, 2008). Kendall et al (2011) reported that low temperatures during seed development increased abscisic acid (ABA) content and reduced gibberellic acid (GA) levels, which can act together to decrease the levels of mRNA for α-amylases and hydrolytic enzymes, strongly decreasing the future seed germination rates (Al-Helal, 1996, Nanjo et al, 2004).…”

Section: Discussionmentioning

confidence: 99%

Seed maturation time influences the germination requirements of perennial grasses in desert climate of Arabian Gulf

Bhatt

Phondani

Pompelli

2018

Saudi Journal of Biological Sciences

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Qatar has a dry, subtropical desert climate, with minimum annual rainfall and intensely hot and humid summers. Using indigenous grass, those adapted to local conditions have the potential to be used for fodder and can also be used for restoration or rehabilitation of degraded rangelands. Chloris virgata, Coelachyrum brevifolium and Cenchrus ciliaris bloom twice a year from April to May (summer) and September to October (winter) under the nursery condition. Therefore, it is important to understand, how seeds produced in different seasons affect the dormancy as well as germination of these species. Seeds of C. virgata, C. brevifolium and C. ciliaris, three desert grasses, were collected from the plants growing on Shahniya nursery in two different seasons, summer (May) and winter (October). The seeds collected in May (summer) were stored up to winter. However seeds collected in October (winter) were immediately used for experiment. We compared the germination potential of seeds that matured in different season at different alternating temperatures at 15/25, 20/30 and 25/35 °C. Lower temperatures correspond to the dark period, while higher temperatures reflect the light period. Seeds collected in summer season (old seeds) were heavier as compared to seeds collected in winter season (new seeds). Winter seeds of C. virgata seem to be dormant, while summer seeds, germinated well in all the tested temperature regimes. However, C. ciliaris seeds showed opposite trends.

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“…Seeds from late populations could be ready for spring germination in the Ginestar and La Granja d'Escarp populations, but in populations such as Camarasa and Estamariu, with delayed dispersion, the probability of not being ready to emerge with spring rains grows considerably. In part of the distribution area of the species, both spring and autumn seasons present optimal temperatures for germination and survival, but droughts are more frequent in spring than in autumn-winter, making autumn the more favorable season for seedling emergence (Llorens et al 2008). Differences in degree of dormancy among seeds matured in late spring-early summer and those that matured in winter have been described for another Mediterranean shrub, Fumana ericoides (Llorens et al 2008).…”

Section: Consequences Of a Warmer Climatementioning

confidence: 97%

“…In part of the distribution area of the species, both spring and autumn seasons present optimal temperatures for germination and survival, but droughts are more frequent in spring than in autumn-winter, making autumn the more favorable season for seedling emergence (Llorens et al 2008). Differences in degree of dormancy among seeds matured in late spring-early summer and those that matured in winter have been described for another Mediterranean shrub, Fumana ericoides (Llorens et al 2008). Differences among early and late populations can thus occur in seed dormancy, seedling survival and seed predation, and they can be enhanced by increasing droughts projected in this region by climate models (Christensen et al 2007).…”

Section: Consequences Of a Warmer Climatementioning

confidence: 99%

Large delay in flowering in continental versus coastal populations of a Mediterranean shrub, Globularia alypum

2011

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Globularia alypum is a perennial shrub typical of western Mediterranean thermophilous shrublands. Nine populations of G. alypum located in different localities of Catalonia (NE Spain) were surveyed for flowering phenology. Flower-head buds were present in all the populations in July. Flowering time in the area spans from the late summer-early autumn to the next spring depending on the populations; there are two groups of populations, early and late flowering. Early populations grow mostly in coastal localities and flower from September to November, whereas late flowering populations grow in inland localities and flower from February to April. The flowering order of the populations correlated with minimum temperature of most months except the warmest ones, and correlated with maximum and mean temperatures of the coldest months. Correlations were similar when tested with annual climate. The flowering order also correlated with the thermic interval for most months except the coldest and with the index of continentality. Early populations alone did not present correlations with any variable, whereas late populations alone correlated similarly to all populations together. Flowering order did not correlate with precipitation. Late populations are proposed to be regulated by temperature according to our results whereas early populations could be regulated by timing in precipitation after summer drought, according to published results. We discuss the possibilities of the two flowering patterns, early and late, being due to phenotypic plasticity or to genetic adaptation to local climates. We also discuss the consequences at the plant and ecosystem level of climate warming causing shifts from late to early patterns, a possibility that is likely in the warmest of the late populations if flowering is modulated phenotypically.

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Seasonality of seed production and germination trends of Fumana ericoides (Cistaceae) in the west semiarid Mediterranean region

Cited by 18 publications

References 25 publications

The stimulating impact of elevated temperatures on growth and productivity of <i>Parthenium hysterophorus</i> L.

The stimulating impact of elevated temperatures on growth and productivity of <i>Parthenium hysterophorus</i> L.

Seed maturation time influences the germination requirements of perennial grasses in desert climate of Arabian Gulf

Large delay in flowering in continental versus coastal populations of a Mediterranean shrub, Globularia alypum

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