Prediction of germination rates of weed species: Relationships between germination speed parameters and species traits

Gardarin, Antoine; Dürr, Carolyne; Colbach, Nathalie

doi:10.1016/j.ecolmodel.2010.10.005

Cited by 74 publications

(67 citation statements)

References 71 publications

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“…Such an observation is regarded as an ecological adaptation process, by which late germinating species are able to compete efficiently with early germinating species (Gardarin et al 2011). In the case of this experiment, thermal conditions in Sicily at the end of May and October are well above 208C and therefore do not seem to pose a relevant obstacle to the germination velocity of this species.…”

Section: Resultsmentioning

confidence: 99%

Germinative response of redroot pigweed (Amaranthus retroflexusL.) to environmental conditions: Is there a seasonal pattern?

Cristaudo

Gresta

Restuccia

et al. 2014

Plant Biosystems - An International Journal Dealing with all As

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Experiments on redroot pigweed (Amaranthus retroflexus L.) were conducted to investigate whether the germinative response to environmental conditions is affected by the time of seed set. Seeds were collected in the same field (Sicily, Southern Italy) in May, July and October; each lot was dry-stored from 15 to 400 days after harvest (DAH) and submitted to germination assays from 15 to 408C, both in continuous darkness (D) and in alternate light/darkness regime (L/D). For the three lots, over 15 DAH, the response to temperature and light regime was strongly affected by harvesting time. Seeds set in May, negatively affected by L/D, showed a high germination capability (.80%) at 95 DAH from 25 to 408C. Seeds set in July were favoured by L/D and required at least 170 DAH to reach 80% germination capability. Seeds set in October were also favoured by L/ D and gave a good germination capability only at 300 and 400 DAH. These results prove that seed germination behaviour in redroot pigweed is not independent of the time of the year in which seeds are produced and is due to both the environmental conditions experienced by the mother plant during seed maturation and those experienced by seeds after seed set.

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Section: Resultsmentioning

confidence: 99%

Germinative response of redroot pigweed (Amaranthus retroflexusL.) to environmental conditions: Is there a seasonal pattern?

Cristaudo

Gresta

Restuccia

et al. 2014

Plant Biosystems - An International Journal Dealing with all As

View full text Add to dashboard Cite

show abstract

“…Seed protein content has been associated with germination behaviour (Brancalion et al, 2008). Modifying the lipid and protein content may contribute to the regulation of imbibition speed (Gardarin et al, 2011;Soriano et al, 2011). However, in H. impetiginosus this seemed to play no role; instead, the seed dimensions were associated with the speed of germination.…”

Section: Discussionmentioning

confidence: 99%

Seedling survival of Handroanthus impetiginosus (Mart ex DC) Mattos in a semi-arid environment through modified germination speed and post-germination desiccation tolerance

et al. 2015

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Uniform rapid seed germination generally forms a great risk for the plant population if subsequent intermittent precipitation causes desiccation and seedling death. Handroanthus impetiginosus can be found commonly in a wide range of biomes within Brazil including those that are semi-arid. Germination and early growth was studied to understand how germinated seeds survive under these stringent conditions. Accessions were sampled from four seasonally dry biomes in Brazil. Precipitation at the start of the rainy season in the Caatinga, a semi-arid biome, is less predictable and the number of successive dry days per dry interval in the first four months of the rainy season was higher than in the other studied biomes. Plants from the Caatinga produced thicker seeds and this trait concurred with slow germination and stronger osmotic inhibition of germination across the accessions, forming a stress avoidance mechanism in the Caatinga. Post-germination desiccation tolerance was high in the Caatinga accession, could be re-induced in accessions from biomes with more regular precipitation (Cerrado and transition zone), but remained poor in the Cerradão accession; thus forming a stress tolerance mechanism. Production of adventitious roots ascertained survival of all tested individuals from all four locations, even if protruded radicles did not survive desiccation, forming an additional stress tolerance mechanism. A sequence of stress avoidance and stress tolerance mechanisms in seeds and germinated seeds was associated with precipitation patterns in different biomes. These mechanisms purportedly allow rapid seedling establishment when conditions are suitable and enable survival of the young seedling when conditions are adverse.Keywords: adaptation, germination, post-germination desiccation tolerance, seed shape, stress tolerance. Sobrevivência de plântulas de Handroanthus impetiginosus (Mart ex DC) Mattos em ambiente semi-árido ocorre por modificação da velocidade de germinação e da tolerância à dessecação pós germinação ResumoA germinação rápida e uniforme geralmente pode apresentar riscos para a população de plantas caso a precipitação ocorra de maneira intermitente, provocando seca e morte das plântulas. Handroanthus impetiginosus pode ser encontrado em uma grande variedade de biomas no Brasil. A germinação e o crescimento inicial das plântulas de Handroanthus impetiginosus foram estudadas para compreender como as sementes germinadas sobrevivem nestas condições. Acessos de quatro biomas que apresentam secas sazonais foram amostrados. A precipitação, no início da estação chuvosa na Caatinga, um bioma semi-árido, é menos previsível e o número de dias secos consecutivos por intervalo de seca, nos primeiros quatro meses da estação chuvosa, foi maior do que nos outros biomas estudados. Plantas do bioma Caatinga produzem sementes mais espessas e essa característica está associada com uma germinação lenta e com a inibição

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“…Chandrasiri et al (1987) also identified an increase in nitrogen that was associated with etiolated germination, and Lee and Karunanithy (1990) pointed out that the protein content was 21 % higher in dehulled, germinated soya beans than in ungerminated seeds (as described by Bau et al 1997). Another study by Ellis and Marshall (1998) also determined that nitrogen fertilization influences seed quality, and Gardarin et al (2011) demonstrated that seed protein content had no significant influence on the germination speed parameters that were measured in 25 weed species. Ene and Bean (1975) also found a correlation between the nitrogen content of ryegrass seeds and the germination rate, and this correlation (R 2 = 0.61) was statistically significant (P = 0.01).…”

Section: Charactersmentioning

confidence: 92%

Effects of carbon and nitrogen content on seed germination of calabrian pine (Pinus brutia) populations

Caliskan

Makineci

2015

Bosque (Valdivia)

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Prediction of germination rates of weed species: Relationships between germination speed parameters and species traits

Cited by 74 publications

References 71 publications

Germinative response of redroot pigweed (Amaranthus retroflexusL.) to environmental conditions: Is there a seasonal pattern?

Germinative response of redroot pigweed (Amaranthus retroflexusL.) to environmental conditions: Is there a seasonal pattern?

Seedling survival of Handroanthus impetiginosus (Mart ex DC) Mattos in a semi-arid environment through modified germination speed and post-germination desiccation tolerance

Effects of carbon and nitrogen content on seed germination of calabrian pine (Pinus brutia) populations

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