scholarly journals Differences in resprouting ability are not related to seed size or seedling growth in four riparian woody species

2007 ◽  
Vol 95 (4) ◽  
pp. 840-850 ◽  
Author(s):  
CAROLINE CHONG ◽  
WILL EDWARDS ◽  
MICHELLE WAYCOTT
Keyword(s):  
Seed Size ◽  
Seedling Growth ◽  
Woody Species ◽  
Resprouting Ability

scholarly journals Effects of different factors on the growth efficiency of rice seedlings

1970 ◽  
Vol 36 (2) ◽  
pp. 171-176 ◽  
Author(s):  
Munnujan Khanam ◽  
Mohammad Al-Yeasa ◽  
Md Sazzadur Rahman ◽  
Abdullah Al-Mahbub ◽  
AR Gomosta
Keyword(s):  
Seed Size ◽  
Seedling Growth ◽  
Salt Solution ◽  
Laboratory Experiments ◽  
Growth Efficiency ◽  
Accelerated Ageing ◽  
Rice Seedlings ◽  
Salinity Levels ◽  
Rice Genotypes ◽  
Seedling Characteristics

Laboratory experiments were conducted to study the effect of salt solution, and size and ageing of seeds on growth efficiency of rice seedlings. Variation in growth efficiency due to different factors was significant. Seeds of Pokkali, BRRI dhan 29, BRRI dhan 40 and BRRI dhan 41 rice genotypes were used. Growth efficiency and other seedling characteristics decreased as salinity levels increased. Three varieties of rice BR 14, BRRI dhan 28 and BR 1, which are large, medium and small grain variety, respectively, were used to study the effect of seed size on growth efficiency and seedling growth. All the parameters decreased remarkably with decreasing seed size. Seed size influenced the growth efficiency significantly. For accelerated ageing test five varieties of freshly harvested seeds were used. The tested varieties responded differently for growth efficiency. When the ageing treatments were extended to 72 hours the growth efficiency depressed markedly for most of the varieties. Key words: Growth efficiency, Ageing, Rice, Salt solution, Seedling growth, Seed size DOI = 10.3329/bjb.v36i2.1508 Bangladesh J. Bot. 36(2): 171-176, 2007 (December)

scholarly journals Does seed size affect the germination rate and seedling growth of peanut under salinity and water stress?

2019 ◽  
Vol 49 ◽  
Author(s):  
Fábio Steiner ◽  
Alan Mario Zuffo ◽  
Aécio Busch ◽  
Tiago de Oliveira Sousa ◽  
Tiago Zoz
Keyword(s):  
Water Stress ◽  
Seed Size ◽  
Seedling Growth ◽  
Germination Rate ◽  
Stress Conditions ◽  
Medium Size ◽  
Dry Matter Accumulation ◽  
Initial Growth ◽  
Sowing Time ◽  
Important Indicator

ABSTRACT Seed size is an important indicator of physiological quality, since it may affect seed germination and seedling growth, especially under stress conditions. This study aimed to investigate the effects of seed size on germination and initial seedling growth, under salinity and water stress conditions. The treatments were arranged in a completely randomized design, in a 3 × 3 factorial scheme: three seed size classes (small, medium and large) and three stress treatments (control, saline or water stress), with four replicates. Water and salt stresses do not reduce the germination rate of medium and large seeds; however, the germination rate of small seeds is reduced under salt stress conditions. Drought stress drastically reduces the shoot growth of seedlings regardless of seed size, whereas root growth is higher in seedlings from medium and large seeds under water stress conditions. Under non-stressful environments, the use of large seeds is preferable, resulting in more vigorous seedlings with a greater dry matter accumulation. Medium-size seeds are more adapted to adverse environmental conditions and, therefore, should be used under conditions of water shortage and salt excess in the soil at sowing time. Seedlings are more tolerant to salinity than to water stress during the germination stage and initial growth under laboratory conditions.

The effect of twig architecture and seed number on seed size variation in subtropical woody species

2009 ◽  
Vol 183 (4) ◽  
pp. 1212-1221 ◽  
Author(s):  
Hong Chen ◽  
Karl J. Niklas ◽  
Dongmei Yang ◽  
Shucun Sun
Keyword(s):  
Seed Size ◽  
Size Variation ◽  
Woody Species ◽  
Seed Number ◽  
Seed Size Variation

Weevil seed damage reduces germination and seedling growth of hybrid American chestnut

2012 ◽  
Vol 42 (6) ◽  
pp. 1107-1114 ◽  
Author(s):  
Harmony J. Dalgleish ◽  
John T. Shukle ◽  
Robert K. Swihart
Keyword(s):  
Seed Size ◽  
Seedling Growth ◽  
Seed Predation ◽  
Test Methods ◽  
Test Method ◽  
American Chestnut ◽  
Limiting Factor ◽  
Ray Method ◽  
X Ray ◽  
Damage Level

Seed predation by weevils (Coleoptera: Curculionidae) has been implicated as a limiting factor in oak recruitment throughout eastern US forests. We examined the effects of weevil seed predation on American chestnut (Castanea dentata (Marsh.) Borkh.). Although an introduced pathogen eradicated sexually reproducing populations of American chestnut in the early 1900s, the recent development of a blight-resistant hybrid makes reintroduction feasible. We nondestructively assessed the amount of weevil damage to seeds using X-ray imagery and traditional float test methods in American and blight-resistant hybrid chestnut. We quantified the effects of weevil damage on seed germination and seedling growth. The float test method misidentified damage for up to 50% of seeds, whereas the X-ray method misidentified only 3% of the sample. Germination declined with damage: the smallest damage level reduced germination from 94% to 32%. No seeds with >50% damage germinated. Weevil damage reduced seedling growth by 50% compared with undamaged seeds. Seedling size increased with seed size, but seed size had no effect on germination. Our results highlight the importance of orchard and seed processing practices that prevent weevil damage to chestnut seeds. Because they drastically reduce germination rates and seedling growth, weevils have the potential to limit seed regeneration and dampen rates of spread in populations following reintroduction.

scholarly journals Relationships between resprouting ability, species traits and resource allocation patterns in woody species in a temperate forest

2016 ◽  
Vol 30 (7) ◽  
pp. 1205-1215 ◽  
Author(s):  
Rei Shibata ◽  
Hiroko Kurokawa ◽  
Mitsue Shibata ◽  
Hiroshi Tanaka ◽  
Shigeo Iida ◽  
...  
Keyword(s):  
Resource Allocation ◽  
Temperate Forest ◽  
Woody Species ◽  
Species Traits ◽  
Allocation Patterns ◽  
Resprouting Ability

scholarly journals Intraspecific variation in seed size and light intensity affect seed germination and initial seedling growth of a tropical shrub

2017 ◽  
Vol 31 (4) ◽  
pp. 736-741 ◽  
Author(s):  
Aniele C. R. Veloso ◽  
Priscila S. Silva ◽  
Wallison K. Siqueira ◽  
Karen L.R. Duarte ◽  
Ingrid L. V. Gomes ◽  
...  
Keyword(s):  
Seed Germination ◽  
Light Intensity ◽  
Intraspecific Variation ◽  
Seed Size ◽  
Seedling Growth

scholarly journals Variation of seed sizes and its effect on germination and seedling growth of mahogany (Swietenia macrophylla)

2019 ◽  
Vol 20 (9) ◽  
Author(s):  
AGUS ASTHO PRAMONO ◽  
DIDA SYAMSUWIDA ◽  
Kurniawati Purwaka Putri
Keyword(s):  
Seed Size ◽  
Seedling Growth ◽  
Germination Rate ◽  
Fruit Size ◽  
Seed Viability ◽  
Initial Growth ◽  
Seed Selection ◽  
Swietenia Macrophylla ◽  
Seed Collection ◽  
Growth Of Seedlings

Abstract. Pramono AA, Syamsuwida D, Putri KP. 2019. Variation of seed sizes and its effect on germination and seedling growth of mahogany (Swietenia macrophylla). Biodiversitas 20: 2576-2582. To get high-quality seeds, the size of seed is often suggested to be criteria of selection in seed collection. However, the size is not always effective to be used as a basis for seed selection. The study is aimed to determine the variation of mahogany (Swietenia macrophylla) seed sizes and its effect on the germination and seedlings growth. The fruits were collected from stands of mahogany in Jonggol and Parung Panjang, Bogor District, Indonesia. The seeds were grouped into 5 classes based on seed size. The observation was conducted on seed viability of each size class as well as the growth of seedlings until 3 months old. The results showed that the seed size of mahogany was affected by position of the seeds inside the fruit, the mother trees, and fruit size. The seeds size of < 6 cm long had significantly lower germination rate and capacity than those seeds of more than 6 cm long. The size of seeds affected the initial growth of seedlings, but did not influence the subsequent growth of seedling after 3 months old. The selection of seeds was done by removing the seeds of less than 6 cm long.  

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