The influences of temperatures on seed germination rate in Himalayan elm (Ulmus wallichiana)

Phartyal, Shyam S.; Thapliyal, R. C.; Nayal, J. S.; Rawat, Monisha; Joshi, Geeta

doi:10.15258/sst.2003.31.1.09

Cited by 37 publications

(31 citation statements)

References 22 publications

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“…Light and temperature are basic environmental factors which restrict successful propagation of many plants through seeds. Seed dormancy, quiescence, germination and seedling growth are complex processes requiring physical, chemical, developmental and genetic analysis (Jones et al 1991;Bewley 1997;Boeuf et al 1999;Nkang et al 2000; Thomas and Davies 2002;Hroudova and Zakravsky 2003;Phartyal et al 2003).…”

Section: Introductionmentioning

confidence: 99%

Expression of Peroxidases During Seedling Growth in Ebenus Cretica L. as Affected by Light and Temperature Treatments

2005

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Peroxidase (POD) activity and isoform patterns were investigated during seedling growth (up to 20 days) of Ebenus cretica L. Seeds germinated to approx. 100% after a 24-h imbibition. Seedling growth proceeded smoothly, in both light and dark conditions. No seedling growth was noticed at 4°C. A positive effect of light and increasing temperature (4, 10, 16, 22 and 28°C) on seedlings growth, lignin content and POD activity was observed. Lignin content was 2.5 times higher in seedlings grown under light than in seedlings grown under darkness. Seedlings' POD activity was higher in acid pH (5.5) in comparison to neutral pH (7.0). These activities were higher in seedlings grown under darkness than in those grown under light; since additional POD isoforms were expressed in dark conditions. The increase in POD activity was accompanied with the appearance of new POD isoforms correlated with the growth of the seedlings. Four soluble anionic POD isoforms (named A 1 , A 2 , A 3 and A 4 ) and three soluble cationic POD isoforms (named C 1 , C 2 and C 3 ) were displayed depending on the treatment and the course of growth. POD isoforms were detected in gel after PAGE. The fast migrating (A 4 ) isoform, which appeared in the dark-grown seedlings as well as on day 20 at 28°C in the temperature treatment, was separated by DEAE-Sepharose column chromatography. A slow migrating C 1 isoform slightly appeared in both 4 and 10°C temperature treatments and could be related to the low temperature treatments, while A 1 , A 2 , A 3 and C 2 to the growth stage of seedlings. The expression of seven POD isoforms during seedling growth seems to be related to different developmental events of growth and could be used as useful biochemical markers in the analysis of metabolic regulation in seedling growth of Ebenus cretica.Abbreviations: PAGE -polyacrylamide gel electrophoresis; PMSF -phenyl methyl sulfonic fluoride; POD -peroxidase; PVPP -polyvinyl polypyrolidone; Tris -tris(hydroxymethyl)aminomethane

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Section: Introductionmentioning

confidence: 99%

Expression of Peroxidases During Seedling Growth in Ebenus Cretica L. as Affected by Light and Temperature Treatments

2005

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“…온도는 종자 발아율 및 발아속도에 영향을 미치는 중요한 요 인으로 (Washitani, 1985;Phartyal et al, 2003), 종자는 일반 적으로 15∼30℃의 범위에서 발아하는 것으로 알려져 있고 야 생식물은 재배종보다 발아적온이 낮은 경향을 보이는 것으로 보고되어 있다 (Copeland and McDonald, 2001). 본 연구에서 (Abeles, 1986;Kim et al, 2009;Kim and Lee, 2013).…”

Section: 발아적온 및 온도조건에 의한 발아특성unclassified

Morphological Characteristics and Germination Conditions of Seeds in Arabis pendula L.

Shin¹,

Lim²,

Kwon³

et al. 2017

Korean Journal of Plant Resources

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-This study aimed to investigate the morphological characteristics and optimal germination conditions in seeds of Arabis pendula L., a traditionally edible and medicinal plant. The external seed shape was circular-obovate with narrow wings and dark brown. The seed length and width were 1.25 ㎜ and 1.47 ㎜, respectively. The seeds were exalbuminous and the embryo was a bent type. Seed germination was the highest (49.7%) at 20°C under dark conditions among the various temperature and light conditions applied. However, under the dark condition, the seedling was weak, overgrown, and the cotyledons were small and folded. To improve the germination and growth of seedlings, the seeds were pre-treated with GA3 solutions of varying concentrations (0, 200, 500, and 1,000 ㎎/L). The seed germination and seedling growth were effectively improved by GA3 pre-treatment. The germination rate was the highest (97.3%), mean germination time was the shortest (8.1 days), and a vigorous growth of seedlings was observed upon pre-soaking the seeds in 500 ㎎/L GA3 solution.In conclusion, the best method for germination was pre-soaking in 500 ㎎/L GA3 (4℃, dark, 24 h) and incubating the seeds at 20℃ for 15 days.

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“…C. macrophylla seeds are short-lived and may be spoiled by temperature variation due to climatic changes [22].…”

Section: Environmental Changesmentioning

confidence: 99%

Conservation Status of Cornus macrophylla: An Important Medicinal Plant from Himalaya

Saira¹,

Iqbal²

2017

J Biodivers Endanger Species

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Cornus macrophylla is important traditional and endangered plant species of western Himalaya. In Pakistan it is found in Nandiar and Hillian sub-valleys of district Battagram in range of 1800-3000 m. It is also present in China, Japan, Afghanistan, and India from 1500-2700 m. C. macrophylla stem bark contains flavonoide ontents. According to the International Union for Conservation of Nature (IUCN), red list C. macrophylla lies in vulnerable category. However, C. macrophylla exists beneath criteria D of critically endangered species in Pakistan as only 47 full-grown plants were bring into being in diverse parts of district Battagram. There are a various threats behind the decrease in C. macrophylla number in western Himalayan which may include deforestation, over-exploitation and climate changes. Conservation strategies are required to protect plants of C. macrophylla. The fruit of C. macrophylla is being used for different ailments like malaria, allergy, infections, inflammation, diabetes, cancer and as lipid peroxidative so an effort should be taken to conserve this significant plant species with promising medicinal properties.

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The influences of temperatures on seed germination rate in Himalayan elm (Ulmus wallichiana)

Cited by 37 publications

References 22 publications

Expression of Peroxidases During Seedling Growth in Ebenus Cretica L. as Affected by Light and Temperature Treatments

Expression of Peroxidases During Seedling Growth in Ebenus Cretica L. as Affected by Light and Temperature Treatments

Morphological Characteristics and Germination Conditions of Seeds in Arabis pendula L.

Conservation Status of Cornus macrophylla: An Important Medicinal Plant from Himalaya

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