Seed Dormancy and Seedling Ecophysiology Reveal the Ecological Amplitude of the Threatened Endemism Picris willkommii (Schultz Bip.) Nyman (Asteraceae)

Fernández, Manuel; Tapias, R.

doi:10.3390/plants11151981

Cited by 3 publications

(1 citation statement)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, this process is also one of the most vulnerable and high-mortality periods in the life history of plant populations [11]. Therefore, research on the seed germination characteristics of endangered plants is of great significance for understanding their life history countermeasures, ecological adaptability, and ability to escape threats, and for researchers to formulate science-based conservation measures [12].…”

Section: Introductionmentioning

confidence: 99%

Effects of Seed Biological Characteristics and Environmental Factors on Seed Germination of the Critically Endangered Species Hopea chinensis (Merr.) Hand.-Mazz. in China

Liu,

Xiao,

Ling

et al. 2023

Forests

View full text Add to dashboard Cite

Hopea chinensis (Merr.) Hand.-Mazz. is a Class II national key protected plant and Plant Species with Extremely Small Populations in China. In order to further analyze why H. chinensis is endangered and optimize conservation techniques, we carried out a study on the effects of seed biological characteristics and environmental factors on the seed germination and seedling growth of H. chinensis. The results show that there were no significant differences in seed morphology between four populations in southern China, but there were significant differences in calyx lobe morphology and seed germination. The removal or retention of the calyx lobes or the seed coat had no significant effect on seed germination. The weight of individual H. chinensis seeds was mainly >1.0 g, with small seeds (<0.5 g) not germinating, whereas seeds >2.0 g had the highest germination rate and fastest seedling growth. H. chinensis produces typical recalcitrant seeds, being sensitive to natural dehydration, with dehydration for 8 d reducing seed viability by 50%, whereas dehydration for 16 d resulted in seeds with zero viability. H. chinensis seeds are light-neutral and capable of germination at a temperature of 30 °C and on a substrate with good water retention and aeration. The seeds are not tolerant of drought, salinity, or flooding. In conclusion, the unique biological characteristics of H. chinensis seeds and the specific habitat which they inhabit contribute to a significant loss of viable seeds, which negatively affects the population’s ability to regenerate and achieve maintenance.

show abstract

Section: Introductionmentioning

confidence: 99%

Effects of Seed Biological Characteristics and Environmental Factors on Seed Germination of the Critically Endangered Species Hopea chinensis (Merr.) Hand.-Mazz. in China

Liu,

Xiao,

Ling

et al. 2023

Forests

View full text Add to dashboard Cite

show abstract

Seed germination ecology of endangered plant Horsfieldia hainanensis Merr. In China

Liu,

Xiao,

Wang

et al. 2024

BMC Plant Biol

View full text Add to dashboard Cite

Background Horsfieldia hainanensis Merr., an indicator species of China’s humid tropical rainforests, is endangered due to difficulties with population regeneration. In this study, the biological characteristics and germination adaptability of the seeds were studied for the first time, in order to provide a basis for analyzing the causes of endangerment and strategies for the artificial cultivation of H. hainanensis. The effects of biological characteristics (population, arils, seed coat, seed weight, seed moisture content) and environmental factors (temperature, light, drought, substrate, burial depth) on seed germination and seedling growth of H. hainanensis were studied. Results and discussion The fruits were found to be capsules containing seeds wrapped in a pericarp and fleshy aril, which provide protection and assist in seed dispersal, but also pose risks to the seeds, as the peel and fleshy aril can become moldy under high temperature and humidity conditions. There were significant differences in fruit morphology and germination characteristics among different populations, and the seed quality of populations in Niandian village, Daxin County, Chongzuo City, Guangxi Zhuang Autonomous Region was better. The arils significantly inhibited seed germination, the germination of large seeds was better, and seedling growth from medium seeds was superior. H. hainanensis seeds were sensitive to dehydration, and intolerant to drought and low temperature, which is typical of recalcitrant seeds. The seeds are suitable for germination on a moist substrate surface with good water retention and breathability at 30–35℃.

show abstract

Overcoming seed dormancy and improving germination of Convolvulus persicus, an endangered coastal plant in north of Iran

Bahadornejad Velashedi,

Kelij,

Jafari

2024

Acta bot. Croat. (Online)

View full text Add to dashboard Cite

Convolvulus persicus L. is an endemic endangered species distributed in the coastal regions of the Caspian Sea and the Black Sea that displays limited germination, potentially impacting its ability to regenerate. To gain an understanding of the dormancy status and germination needs of C. persicus, seed characteristics, seed coat permeability and different dormancy-breaking treatments were assessed. The results revealed that C. persicus seed coats are water-impermeable and that both cold and warm stratification were effective in breaking dormancy. Furthermore, GA3 pretreatment with combination of either cold or warm stratification proved successful in releasing dormancy. However, the highest germination percentage and rate as well as seed vigour was achieved by mechanical scarification followed by H2SO4 application and warm stratification. Warm stratification was recognized to be more favourable for overcoming seed dormancy and promoting seedling survival than cold stratification. Notably, the influence of population type on germination capacity was found to be negligible. These findings may facilitate the conservation and collection management of this threatened plant species, which is currently underrepresented in ex situ conservation efforts.

show abstract

Seed Dormancy and Seedling Ecophysiology Reveal the Ecological Amplitude of the Threatened Endemism Picris willkommii (Schultz Bip.) Nyman (Asteraceae)

Cited by 3 publications

References 54 publications

Effects of Seed Biological Characteristics and Environmental Factors on Seed Germination of the Critically Endangered Species Hopea chinensis (Merr.) Hand.-Mazz. in China

Effects of Seed Biological Characteristics and Environmental Factors on Seed Germination of the Critically Endangered Species Hopea chinensis (Merr.) Hand.-Mazz. in China

Seed germination ecology of endangered plant Horsfieldia hainanensis Merr. In China

Overcoming seed dormancy and improving germination of Convolvulus persicus, an endangered coastal plant in north of Iran

Contact Info

Product

Resources

About