Effect of environmental conditions on Alopecurus myosuroides germination. I. Effect of temperature and light

Colbach, Nathalie; Chauvel, Bruno; Dürr, Carolyne; Richard, Guy

doi:10.1046/j.1365-3180.2002.00279.x

Cited by 25 publications

(40 citation statements)

References 28 publications

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“…Dishes were then incubated at 20uC under six fluorescent lighting tubes 3 (Osram, L 18 W/77, 20 mmol m 22 s 21 , 24 h). For seeds to be tested in darkness, all manipulations were carried out in a dark room under a green light to avoid stimulation of germination, as shown by Colbach et al (2002). Dishes also were wrapped with two layers of aluminum foil.…”

Section: Methodsmentioning

confidence: 99%

Effects of Storage and Burial on Germination Responses of Encapsulated and Naked Seeds of Turnipweed (Rapistrum rugosum) to Light

2011

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Information on the germination and viability of turnipweed seeds could be helpful in developing appropriate management strategies for this weed. Therefore, experiments were conducted to investigate the effects of light, storage conditions, duration of storage or burial, and seed type (naked, i.e., fruit wall was removed and encapsulated in siliques) on germination and viability of turnipweed. The naked and encapsulated seeds (fruit) were kept under five different storage conditions, including dry storage at 25 ± 2 C and 3 ± 1 C and outdoor environments (soil depths of 10, 20, and 40 cm). All seeds were retrieved every 2 mo and tested for germination in light and darkness. At each exhumation date, nongerminated seeds were treated with triphenyltetrazolium chloride to test their viability. The germination of seeds liberated from siliques (85%) was markedly greater than that of seeds in intact siliques (20%). The germination response of naked and encapsulated seeds to light varied between storage conditions and through time. Under indoor conditions (room and cold), both seed types had greater germination percentages in dark on most occasions than those in light. On the contrary, the germination of siliques buried at soil depths of 20 or 40 cm was considerably stimulated by light. Under indoor conditions, the percent viability of both seed types only declined marginally, whereas seeds buried in soil showed high rates of mortality. Seeds in intact siliques persisted longer under either indoor or outdoor conditions than naked seeds.

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Section: Methodsmentioning

confidence: 99%

Effects of Storage and Burial on Germination Responses of Encapsulated and Naked Seeds of Turnipweed (Rapistrum rugosum) to Light

2011

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“…It overwinters in a two‐leaf to five‐tiller stage with vigorous resumption of growth in spring. The germination base temperature is estimated to be at around 0°C (Colbach, Chauvel, Dürr, & Richard, ). Plants have a shallow root system and reach up to 80 cm in height (Naylor, ).…”

Section: Methodsmentioning

confidence: 99%

Soil water potential and temperature sum during reproductive growth control seed dormancy in Alopecurus myosuroides Huds.

Menegat

Milberg

Nilsson

et al. 2018

Ecology and Evolution

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The sustainable management of unwanted vegetation in agricultural fields through integrated weed control strategies requires detailed knowledge about the maternal formation of primary seed dormancy, to support the prediction of seedling emergence dynamics. This knowledge is decisive for the timing of crop sowing and nonchemical weed control measures. Studies in controlled environments have already demonstrated that thermal conditions and, to some extent, water availability during seed set and maturation has an impact on the level of dormancy. However, it is still unclear if this applies also under field conditions, where environmental stressors and their timing are more variable. We address this question for Alopecurus myosuroides in south‐western Sweden. We quantified the effects of cumulated temperature and precipitation as well as soil water potential during the reproductive growth phase of A myosuroides on primary seed dormancy under field conditions. Empirical models differing in focal time intervals and, in case of soil water potential, focal soil depths were compared regarding their predictive power. The highest predictive power for the level of primary dormancy of A. myosuroides seeds was found for a two‐factorial linear model containing air temperature sum between 0 and 7 days before peak seed shedding as well as the number of days with soil water potential below field capacity between 7 and 35 days before peak seed shedding. For soil water potential, it was found that only the top 10 cm soil layer is of relevance, which is in line with the shallow root architecture of A. myosuroides. We conclude that for this species the level of dormancy depends on the magnitude and timing of temperature and water availability during the reproductive growth phase. Water availability appears to be more important during maternal environmental perception and temperature during zygotic environmental perception.

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“…Some seeds germinate equally well in both light and darkness (Baskin & Baskin 1988), while others germinate more readily in either light (Colbach et al 2002) or dark conditions (Thanos et al 1989). In light-sensitive species, for example, seeds will not germinate if they remain covered by litter or soil.…”

Section: Introductionmentioning

confidence: 99%

Effects of microhabitat, light and temperature on seed germination of a critically endangered Himalayan medicinal herb,Swertia chirayita: Conservation implications

Pradhan

Badola

2012

Plant Biosystems - An International Journal Dealing with all As

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Swertia chirayita, a critically endangered medicinal herb, is being over-harvested in the wild. Understanding seed germination is a pre-requisite to ensure species conservation. The germination of seeds collected from six microhabitats was studied at 208C, 258C, and 308C, both under a 14/10 h light/dark photoperiod and in continuous darkness. Two-way ANOVA indicated that microhabitat and temperature significantly affect seed germination, germination rate, germination recovery (GR), and GR rate. Overall, the seeds collected from under canopy showed a significantly (p 5 0.05) higher germination than those from open habitats, at 208C, 258C, and 308C (14/10 h light/dark photoperiod). Germination was negligible in continuous darkness but after transfer to a 14/10 h light/dark photoperiod, the seeds from under canopy significantly recovered at 208C and at 258C (p 5 0.05), and showed the highest germination percentage compared to seeds collected from tree base, stump base, shrubberies, and grassy slope. Similarly, at 308C, seeds from under canopy recorded the highest GR percentage. In general, seed germination, mean germination rate, seed GR, and GR rate were significantly greater (p 5 0.05) at 258C. Among the microhabitats tested, variation in GR rate was significant (p 5 0.05). Seeds were confirmed to be positively photoblastic.

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Effect of environmental conditions on Alopecurus myosuroides germination. I. Effect of temperature and light

Cited by 25 publications

References 28 publications

Effects of Storage and Burial on Germination Responses of Encapsulated and Naked Seeds of Turnipweed (Rapistrum rugosum) to Light

Effects of Storage and Burial on Germination Responses of Encapsulated and Naked Seeds of Turnipweed (Rapistrum rugosum) to Light

Soil water potential and temperature sum during reproductive growth control seed dormancy in Alopecurus myosuroides Huds.

Effects of microhabitat, light and temperature on seed germination of a critically endangered Himalayan medicinal herb,Swertia chirayita: Conservation implications

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