Seed biology – from lab to field

Penfield, Steven

doi:10.1093/jxb/erx021

Cited by 20 publications

(6 citation statements)

References 25 publications

(28 reference statements)

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“…Previous studies have shown that seed germination in Stipa is somewhat dependent on alternating temperatures [31,50]. In this study, the germination percentage of S. purpurea under the warming and control treatments was higher than when under the optimal treatment; this further supports the hypothesis that variable temperature conditions promote seed germination in S. purpurea, likely due to the fact that the seed coat expands, shrinks, and ruptures under the changeable conditions to allow gas exchange and nutrient transformation within seeds [5,23]. This may also explain why higher germination percentages were observed for S. capillacea and F. coelestis under the warming, rather than optimal, treatment.…”

Section: Effects Of Species Identity On Seed Germination In Alpine Grsupporting

confidence: 84%

“…Increasing temperatures can accelerate the metabolic responses of seeds during germination. Extreme low or high temperatures will alter cell membrane permeability and restrain catalytic activities [5,23]. For example, the germination percentage of arctic dwarf shrub seeds was found to increase with warming within a specific temperature range [24].…”

Section: Introductionmentioning

confidence: 99%

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Seed Germination in Alpine Meadow Steppe Plants from Central Tibet in Response to Experimental Warming

et al. 2020

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Clarifying the effects of climate warming on seed germination is critical for predicting plant community assembly and species renewal, especially in alpine grassland ecosystems where warming is occurring faster than in other biomes globally. We collected matured seeds of 19 common species from a typical alpine meadow steppe community in Central Tibet. Seeds were germinated in three incubators with manipulated day-night temperatures to impose three treatments: (1) theoretically optimal values of 25/15 °C, (2) temperatures observed in the field (control), and (3) a warming of 3 °C above the observed temperatures. We calculated seed germination percentage (SGP) and mean germination time (MGT) per species at different treatments. Our results showed that SGPs of Stipa capillacea, Kobresia macrantha, Potentilla saundersiana, Saussurea tibetica, Pedicularis kansuensis, and Androsace graminifolia were higher under the warming treatment than under control. Among them, the MGTs of S. capillacea, K. macrantha, and And. graminifolia were significantly shortened, while the MGT of Pe. kansuensis was significantly lengthened by warming of 3 °C. Significant decreases in MGT induced by warming were only observed for Festuca coelestis and Anaphalis xylorhiza. Additionally, the treatment with theoretically optimal temperatures restrained germination of Stipa purpurea, S. capillacea, F. coelestis, and Sa. tibetica seeds but promoted germination of K. macrantha, Astragalus strictus, P. saundersiana, Potentilla bifurca, Pe. kansuensis, Swertia tetraptera, Pleurospermum hedinii, and And. Graminifolia seeds, when compared with the control and warming treatments. Therefore, the response of seed germination to warming differs among alpine species, implying that future warming could result in significant changes in community assembly of alpine grasslands on the Tibetan Plateau.

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Section: Effects Of Species Identity On Seed Germination In Alpine Grsupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Seed Germination in Alpine Meadow Steppe Plants from Central Tibet in Response to Experimental Warming

et al. 2020

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“…Rising temperatures can also accelerate seed metabolic responses during germination [ 43 ]. Seed germination is a complex process involving an ordered series of internal biochemical reactions, production, and elimination of substances and other processes (e.g., glycolysis and scavenging of a free radical), all of which need to be conducted at a specific temperature threshold, then reflected in the process of seed germination [ 64 , 65 ]. For example, higher temperature variation (12~22 °C) significantly increased the percentage for the germination of K. schoenoides [ 66 ].…”

Section: Resultsmentioning

confidence: 99%

Research Progress on Dormancy Mechanism and Germination Technology of Kobresia Seeds

Wang

Zhang

et al. 2022

Plants

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Kobresia is a subfamily of Cyperaceae, a perennial herbaceous plant that stores a large amount of organic carbon and nutrients (nitrogen, phosphorus, etc.) in the soil. This type of grass is soft and appreciated by all kinds of farm animals. It is one of the predominantly excellent fodder on the Qinghai–Tibet Plateau. Its good growth plays an important role in developing the local economy and maintaining ecological balance on the Qinghai–Tibet Plateau as well. The main objectives of this review are to systematically present and analyze the factors responsible for the low germination rate of Kobresia and to analyze the physical and chemical methods that are used in order to alleviate dormancy and to improve the germination rate of Kobresia seeds. This is performed in order to lay the foundation for future research in this field. At the same time, we have analyzed the research deficiencies and formulated recommendations for the future. This review will provide comprehensive information in order to reduce the cost of planting Kobresia, as well as to provide theoretical support and technical guidance for the purposes of ecosystem restoration and livestock development.

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“…But increasingly we have encouraged writers to go further than this, taking a view on the state of the field, wider implications and new directions, much as one would take away from participation in the sessions at meetings. In this issue, again linking with major sessions at the SEB meeting, such editorials cover seed development, maturation and germination ( Penfield, 2017 ), the plant hormones auxin ( Weijers et al , 2018 ) and jasmonate ( Zhu and Napier, 2017 ), and plant senescence ( Woo et al , 2018 ). All plant biology links with global environmental issues, but research in JXB often makes this connection directly, including in the editorials by Griffiths et al (2017) , which advances new evolutionary ideas in the area of carbon concentrating mechanisms in aquatic photosynthesis, and Considine et al (2017) , which sets out the need for crop improvement programmes to re-focus on legumes in coming years, addressing the challenge of food security and climate change ( Considine et al , 2017 ).…”

Section: Interpreting the Sciencementioning

confidence: 99%