Functional and quantitative analysis of seed thermal responses in prostrate knotweed (<i>Polygonum aviculare</i>) and common purslane (<i>Portulaca oleracea</i>)

Kruk, Betina Claudia; Benech‐Arnold, Roberto L.

doi:10.1017/s0043174500090214

Cited by 52 publications

(53 citation statements)

References 21 publications

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“…Under field conditions, P. aviculare seeds form persistent seedbanks and show seasonal changes in their dormancy status (Courtney, 1968; Baskin & Baskin, 1990). Kruk and Benech‐Arnold (1998) demonstrated that low temperatures alleviated dormancy, while high temperatures reinforced dormancy in seeds of this species. This thermal regulation of seed dormancy status under field conditions leads to a short emergence flush in spring, as seeds are released from dormancy during winter.…”

Section: Introductionmentioning

confidence: 87%

A quantitative analysis of temperature‐dependent dormancy changes in Polygonum aviculare seeds

et al. 2009

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Summary Mathematical models that predict emergence of weed seedbanks could be useful tools for determining the most suitable time for weed seedling control and, consequently, should result in a higher efficacy of applied control methods. To achieve this goal in dormant weed species, functional relationships should be established between environmental factors regulating dormancy and dormancy changes of seed populations. In the present work, we used a simple model and an optimisation procedure to quantify the effect of temperature on Polygonum aviculare seed dormancy release and induction, based on germination data. Dormancy release rate was inversely related to temperature, showing a decreasing logistic trend that results in no dormancy release for seeds exposed to 20 and 25°C. In contrast, dormancy induction rates in absolute values were positively associated with temperature, showing a logistic trend in which dormancy induction was almost zero at low temperatures and maximal at 25°C. Derived model parameters were used to simulate dormancy changes of P. aviculare seeds stored under controlled and field conditions. These results suggest that similar model structures could be used to quantify temperature effects on seed dormancy status of other weed species and to develop predictive models of weed emergence.

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Section: Introductionmentioning

confidence: 87%

A quantitative analysis of temperature‐dependent dormancy changes in Polygonum aviculare seeds

et al. 2009

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“…Remaining ungerminated seeds were later exposed to 25°C and daily alternating temperatures of 25°C (12h) / 12°C (12h) for 7 days at the end of the DT and IT regimes, respectively (Kruk and Benech-Arnold, 1998). Percentage germination attained immediately before seeds were subjected to either 25°C or 25°C/12°C was defined as 'final percentage germination' at that regime, while that attained after incubation at 25°C or 25°C/12°C was defined as 'maximum percentage germination'.…”

Section: Germination Test Systemmentioning

confidence: 99%

“…In relation to the first effect, the thermal environment may either increase or decrease the dormancy level of a seed population (Roberts, 1988). Dormancy cycles observed in some species are known to be regulated mainly by temperature Baskin, 1977, 1984;Bouwmeester andKarssen, 1992, 1993;Kruk and Benech-Arnold, 1998). For example, some summer annuals undergo dormancy relief by low temperatures experienced during winter, and their dormancy level is enhanced by high temperatures experienced during summer Baskin, 1977, 1984;Bouwmeester andKarssen, 1992, 1993;Kruk and Benech-Arnold, 1998).…”

Section: Introductionmentioning

confidence: 99%

“…and Karssen, 1992;Probert, 1992). Recently, we have shown that the screening method developed by Washitani (1987) is a useful means for studying seed thermal responses both functionally and quantitatively (Kruk and Benech-Arnold, 1998). Thus, when the dormancy level of a population is at its minimum, the temperature range permissive for germination is at its widest.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of dormancy and germination responses to temperature inCarduus acanthoides and Anagallis arvensisusing a screening system, and relationship with field-observed emergence patterns

Kruk

Benech‐Arnold

2000

Seed Sci. Res.

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Experiments on the facultative winter annuals Carduus acanthoides and Anagallis arvensis were performed: (i) to determine thermal conditions that induce or release dormancy, (ii) to investigate to what extent changes in dormancy level resulting from those thermal conditions explain the seasonal pattern of emergence of these species, and (iii) to estimate required thermal time and base temperature for the germination of non-dormant seeds. Carduus acanthoides required high temperatures followed by decreasing temperatures for dormancy release; however, low winter temperatures did not induce secondary dormancy as expected for a winter annual. To the contrary, low temperatures stimulated dormancy release in the long term. InA. arvensis, dormancy relief was enhanced by dry storage at 25°C, and the response to low temperature was different depending on moisture conditions. Prolonged exposure to moist-chilling increased the dormancy level of the population, while dry storage at 4°C relieved dormancy. For both species, changes in the thermal range permissive for germination as a result of dormancy modifications explained to a large extent the timing of the emergence periods observed in the field. In neither species did base temperature for germination change with the dormancy level of the population. Thermal time required forgermination ofC. acanthoidesvaried with dormancy, while forA. arvensisseeds it was constant.

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“…A good example of plasticity in a dormancy strategy can be found in Polygonum aviculare (prostrate knotweed). Seeds from this summer annual weed are dispersed with high dormancy at the end of the summer and become buried easily due to their small size . Low soil temperatures in autumn and winter release these seeds from primary dormancy if they are imbibed enough through the stratification process, determining the opening of an emergence window between mid‐winter and early spring.…”

Section: Seed Dormancy As a Trait For Adjustment: Stories Of Evolutiomentioning

confidence: 99%

Dormancy, a critical trait for weed success in crop production systems

Batlla

Ghersa

Benech‐Arnold

2020

Pest Management Science

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Agricultural practices exert selective forces on weed populations. As these practices change over time, weed adaptive traits also evolve, allowing weeds to persist in the new environment. However, only weeds having individuals showing the trait with adaptive significance will be able to cope with these changes, thus allowing a sub‐population to be selected for persistence. In addition, changes in agricultural practices can select new weed species showing functional traits with characteristics adaptive to the modified system. Seed dormancy has long been recognized as a trait with enormous adaptive value to adjust weed biology to cropping systems. In this paper, we illustrate with examples of success and failure, the value of seed dormancy as a functional trait to cope with long‐term changes in crop production systems. We show that successful outcomes are mostly related to the existence of sufficient variability for the functioning of physiological mechanisms that control dormancy characteristics as influenced by the agricultural environment. Presented examples illustrate how knowledge about the relationship that exists between agricultural practices and their selective pressure on seed dormancy can be instrumental in predicting changes in weed biotype dormancy characteristics or foreseeing the appearance of new weed species in future agricultural scenarios. © 2019 Society of Chemical Industry

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Functional and quantitative analysis of seed thermal responses in prostrate knotweed (Polygonum aviculare) and common purslane (Portulaca oleracea)

Cited by 52 publications

References 21 publications

A quantitative analysis of temperature‐dependent dormancy changes in Polygonum aviculare seeds

A quantitative analysis of temperature‐dependent dormancy changes in Polygonum aviculare seeds

Evaluation of dormancy and germination responses to temperature inCarduus acanthoides and Anagallis arvensisusing a screening system, and relationship with field-observed emergence patterns

Dormancy, a critical trait for weed success in crop production systems

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