Caryopsis germination and seedling emergence in an inland dune dominant grass Leymus secalinus

Zhu, Yanhui; Dong, Ming; Huang, Zhenying

doi:10.1016/j.flora.2006.05.006

Cited by 13 publications

(10 citation statements)

References 25 publications

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“…A very similar relationship also has been reported for seeding emergence of Leymus arenarius [11]. Seedling emergence of Leymus secalinus in the same region as our study decreased as sand burial depth increased, and 1–2 cm was the optimal depth for seedling emergence [12], [30]. Huang and Gutterman studied seedling emergence in response to sand burial of a close relative of the test species of our study, Artemisia monosperma , and reported that the deeper the achenes in sand, the lower and slower their emergence [3].…”

Section: Discussionsupporting

confidence: 90%

Seed Mucilage Improves Seedling Emergence of a Sand Desert Shrub

Yang

Baskin

et al. 2012

PLoS ONE

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The success of seedling establishment of desert plants is determined by seedling emergence response to an unpredictable precipitation regime. Sand burial is a crucial and frequent environmental stress that impacts seedling establishment on sand dunes. However, little is known about the ecological role of seed mucilage in seedling emergence in arid sandy environments. We hypothesized that seed mucilage enhances seedling emergence in a low precipitation regime and under conditions of sand burial. In a greenhouse experiment, two types of Artemisia sphaerocephala achenes (intact and demucilaged) were exposed to different combinations of burial depth (0, 5, 10, 20, 40 and 60 mm) and irrigation regimes (low, medium and high, which simulated the precipitation amount and frequency in May, June and July in the natural habitat, respectively). Seedling emergence increased with increasing irrigation. It was highest at 5 mm sand burial depth and ceased at burial depths greater than 20 mm in all irrigation regimes. Mucilage significantly enhanced seedling emergence at 0, 5 and 10 mm burial depths in low irrigation, at 0 and 5 mm burial depths in medium irrigation and at 0 and 10 mm burial depths in high irrigation. Seed mucilage also reduced seedling mortality at the shallow sand burial depths. Moreover, mucilage significantly affected seedling emergence time and quiescence and dormancy percentages. Our findings suggest that seed mucilage plays an ecologically important role in successful seedling establishment of A. sphaerocephala by improving seedling emergence and reducing seedling mortality in stressful habitats of the sandy desert environment.

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Section: Discussionsupporting

confidence: 90%

Seed Mucilage Improves Seedling Emergence of a Sand Desert Shrub

Yang

Baskin

et al. 2012

PLoS ONE

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“…; El-Keblawy andAl-Rawai, 2005;Zhu et al, 2007). The germination tests with D. harra suggest that this species has no requirement for light to germinate.…”

mentioning

confidence: 91%

Germination responses of Diplotaxis harra to temperature and salinity

Tlig

Gorai

Neffati

2008

Flora - Morphology, Distribution, Functional Ecology of Plants

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“…Firstly, various seed genotypes may respond differently to conditions at the time of germination. Hence, seed dormancy could function as a type of sieve, screening when and where particular seed genotypes germinate and establish from the soil (Cabin, 1996;Karlsson and Milberg, 2008;Mandák et al, 2006a;Zhu et al, 2007). Secondly, the ability of a seedling to survive the most hazardous life stage of a plant may create fine spatial genetic variability in relation to local ecological conditions (Chung et al, 2003;Kalisz et al, 2001;Mandák et al, 2006b).…”

Section: Discussionmentioning

confidence: 99%