Comparison of germination and seed bank dynamics of dimorphic seeds of the cold desert halophyte Suaeda corniculata subsp. mongolica

Cao, Dechang; Baskin, Carol C.; Baskin, Jerry M.; Yang, Fan; Huang, Zhenying

doi:10.1093/aob/mcs205

Cited by 52 publications

(40 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Heteromorphic fruits/seeds have been studied most extensively in species with dimorphic aerial diaspores (heterodiaspory sensu Mandák, 1997;, which differ in dispersal mode and ability (Sorensen, 1978;Baker and O'Dowd, 1982;Ma et al, 2010), degree of dormancy/germination characteristics (Venable and Levin, 1985a;El-Keblawy, 2003;Brändel, 2004) and ability to persist in a seed bank (Philipupillai and Ungar, 1984;Venable and Levin, 1985b;Joley et al, 2003;Cao et al, 2012). However, the fates of dimorphic fruits/seeds beginning with seed release and ending with germination and beyond have been documented for only a few heteromorphic species in the soil seed bank (Venable and Levin, 1985a,b;Venable et al, 1987;Mandák and Pyšek, 2005;Cao et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Post-release fates of seeds in dehiscent and indehiscent siliques of the diaspore heteromorphic species Diptychocarpus strictus (Brassicaceae)

Tan

Baskin

et al. 2015

Perspectives in Plant Ecology, Evolution and Systematics

Self Cite

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Post-release fates of seeds in dehiscent and indehiscent siliques of the diaspore heteromorphic species Diptychocarpus strictus (Brassicaceae)

Tan

Baskin

et al. 2015

Perspectives in Plant Ecology, Evolution and Systematics

Self Cite

View full text Add to dashboard Cite

“…Furthermore, fruit heteromorphy can increase regeneration in unpredictable habitats by producing fruits that require different environmental conditions for germination (, ) or by increasing the spatiotemporal range of seed germination (, and ). The response of seeds to temperature and salinity regimes has been shown to vary among morphs within a species (, ,, ), and affect the distribution, settlement and seed germination strategy of a plant (). Approximately 87% of all plant species adapted for arid, semi‐arid, desertified, salinized, and severely disturbed areas produce heteromorphic seeds ().…”

mentioning

confidence: 99%

Perianth colour dimorphism is related to germination properties and salinity tolerance in Salsola vermiculata in the Arabian deserts

Bhatt

Phartyal

Phondani

et al. 2017

Nordic Journal of Botany

View full text Add to dashboard Cite

We investigated the dimorphic perianth colour of Salsola vermiculata and its association with seed germination percentage, interactions with temperature, light, salinity and recovery from prior salinity exposure. Seeds with and without pink and yellow perianth were incubated at three thermal regimes, two photoperiods, and five salinity levels. Germination recovery after salinity exposure was observed on seeds that failed to germinate during the salinity study. The germination percentage and rate were signiﬁcantly related to the perianth colour, the presence of perianth wings, thermal regimes and photoperiod. The presence of a perianth wing significantly reduced germination percentage and germination rate in both the pink and the yellow morph, but the yellow morph exhibited a higher germination percentage. Perianth wing removal increased germination in saline conditions. With the perianth removed, germination recovery was higher for the pink morph than for the yellow one. We suggest that by providing two different strategies for balancing germination with dormancy during favourable conditions, the presence of two morphs makes S. vermiculata more successful in highly unpredictable desert environments.

show abstract

“…The dormant, and therefore later germinating black seeds, provide a bet‐hedging strategy against failure of the non‐dormant brown seeds (Cao et al. , Yang et al. ).…”

Section: Introductionmentioning

confidence: 99%

“…For example, Suaeda corniculata from semiarid Inner Mongolia produces non-dormant large brown and dormant small black seeds. The dormant, and therefore later germinating black seeds, provide a bethedging strategy against failure of the non-dormant brown seeds (Cao et al 2012, Yang et al 2015. However, the riskier strategy for brown seeds, which emerge earlier when moisture availability is less certain during spring, is offset by their seedlings' ability to grow larger than those of black seeds, and produce correspondingly higher numbers of seeds by the end of the growing season.…”

mentioning

confidence: 99%

Seedling performance covaries with dormancy thresholds: maintaining cryptic seed heteromorphism in a fire‐prone system

Liyanage

Ayre

Ooi

2016

Ecology

View full text Add to dashboard Cite

Abstract. The production of morphologically different seeds or fruits by the same individual plant is known as seed heteromorphism. Such variation is expected to be selected for in disturbance-prone environments to allow germination into inherently variable regeneration niches. However, there are few demonstrations that heteromorphic seed characteristics should be favored by selection or how they may be maintained. In fire-prone ecosystems, seed heteromorphism is found in the temperatures needed to break physical dormancy, with seeds responding to high or low temperatures, ensuring emergence under variable fire-regime-related soil heating. Because of the relationship between dormancy-breaking temperature thresholds and fire severity, we hypothesize that different post-fire resource conditions have selected for covarying seedling traits, which contribute to maintenance of such heteromorphism. Seeds with low thresholds emerge into competitive conditions, either after low-severity fire or in vegetation gaps, and are therefore likely to experience selection for seedling characteristics that make them good competitors. On the other hand, high-temperature-threshold seeds would emerge into less competitive environments, indicative of stand-clearing high-severity fires, and would not experience the same selective forces. We identified high and low-threshold seed morphs via dormancy-breaking heat treatments and germination trials for two study species and compared seed mass and other morphological characteristics between morphs. We then grew seedlings from the two different morphs, with and without competition, and measured growth and biomass allocation as indicators of seedling performance. Seedlings from lowthreshold seeds of both species performed better than their high-threshold counterparts, growing more quickly under competitive conditions, confirming that different performance can result from this seed characteristic. Seed mass or appearance did not differ between morphs, indicating that dormancy-breaking temperature threshold variation is a form of cryptic heteromorphism. The potential shown for the selective influence of different post-fire environmental conditions on seedling performance provides evidence of a mechanism for the maintenance of heteromorphic variation in dormancy-breaking temperature thresholds.

show abstract

Comparison of germination and seed bank dynamics of dimorphic seeds of the cold desert halophyte Suaeda corniculata subsp. mongolica

Cited by 52 publications

References 52 publications

Post-release fates of seeds in dehiscent and indehiscent siliques of the diaspore heteromorphic species Diptychocarpus strictus (Brassicaceae)

Post-release fates of seeds in dehiscent and indehiscent siliques of the diaspore heteromorphic species Diptychocarpus strictus (Brassicaceae)

Perianth colour dimorphism is related to germination properties and salinity tolerance in Salsola vermiculata in the Arabian deserts

Seedling performance covaries with dormancy thresholds: maintaining cryptic seed heteromorphism in a fire‐prone system

Contact Info

Product

Resources

About