Pollen vitality and germination capacity in three taxa of the genus Brassica L. (Brassicaceae)

2020 ◽  
Vol 53 (3) ◽  
Author(s):  
Shaukat Ali ◽  
Anjum Perveen
Keyword(s):  
Germination Capacity ◽  
Pollen Vitality

scholarly journals Effect Of Preserved Seeds Using Different Botanicals On Seed Quality Of Lentil

1970 ◽  
Vol 36 (3) ◽  
pp. 381-387 ◽  
Author(s):  
A Khatun ◽  
G Kabir ◽  
MAH Bhuiyan ◽  
D Khanam
Keyword(s):  
Moisture Content ◽  
Azadirachta Indica ◽  
Seed Quality ◽  
Shoot Length ◽  
Germination Capacity ◽  
Laboratory Studies ◽  
Polygonum Hydropiper ◽  
Vigour Index ◽  
Leaf Powder

Laboratory studies were conducted with leaf powder of three plants to show the preservative effect for maintaining the quality of lentil seeds in storage. After processing and drying, seeds were preserved with different botanicals and stored them in earthen pots for eight months. Botanicals, such as whole leaf powder of neem (Azadirachta indica), dholkalmi (Ipmoea sepiara), and bishkatali (Polygonum hydropiper) were used at a dose of 5% w/w (25 g botanical per 500 g of lentil seeds). The lentil seeds were stored till next planting time and seed quality, such as moisture content, germination capacity, root length, shoot length of the seedlings and vigour index were observed. The highest values for all these characters except moisture content were significant when the seeds were preserved with neem leaf powder and bishkatali. Among three botanicals, dholkalmi was less effective. Keywords: Lentil; botanicals; storage; seed quality DOI: http://dx.doi.org/10.3329/bjar.v36i3.9266 BJAR 2011; 36(3): 381-387

scholarly journals Germination Capacity and Seedling Survival of Moussonia deppeana (Gesneriaceae) from the Montane Cloud Forests

2018 ◽  
Vol 13 (1) ◽  
pp. 11-18 ◽  
Author(s):  
Alicia Enriqueta ◽  
Yazmin Jurado-Gon ◽  
Guillermo Laguna-Her ◽  
Armando Gomez-Camp ◽  
Rosa Maria Fons
Keyword(s):  
Seedling Survival ◽  
Germination Capacity ◽  
Cloud Forests

scholarly journals Seed Germination Variation among Crop Years from a Pinus sylvestris Clonal Seed Orchard

2019 ◽  
pp. 1-14
Author(s):  
Melusi Rampart
Keyword(s):  
Seed Germination ◽  
Seed Weight ◽  
Seed Orchard ◽  
Climatic Conditions ◽  
Thermal Time ◽  
Base Temperature ◽  
Germination Capacity ◽  
Seed Collection ◽  
Clonal Seed Orchard ◽  
The Mean

Maternal effects were assessed by germinating seeds sourced over multiple years from the same cloned mother trees, comparing germination capacity and rate between crop years. The relationships between climatic variables, seed characteristics and germination capacity were determined, and thermal time parameters were used to predict seed dormancy release and germination under the climatic conditions in the year after seed collection. There were significant differences in seed weight (P < 0.05), seed length and embryo occupancy (both P < 0.001) among crop years. Temperature during the seed development period explained 70% of the variation in seed weight and 63% of the variation in embryo occupancy. Germination capacity was significantly (P <0.001) different among crop years, among temperatures and among chilling durations, and thermal time requirements for germination increased from older (2007) to younger (2012) seeds. The mean base temperature without chilling was 7.1°C, while after chilling it was 4.6°C and 3.6°C for four and eight weeks chilling respectively. The mean thermal time to 50% germination without chilling was 135.1°Cd, while after chilling it was 118.3°Cd and 154.0°Cd for four and eight weeks chilling respectively. This experiment demonstrates that year-to-year differences in the environment experienced by mother trees during seed maturation can affect seed germination characteristics.

scholarly journals FACTORS AFFECTING THE VIABILITY AND GERMINATION BEHAVIOR OF CONIFEROUS SEED: PART I: CONE AND SEED MATURITY, TSUGA HETEROPHYLLA (RAFN.) SARG.

1958 ◽  
Vol 34 (3) ◽  
pp. 266-274 ◽  
Author(s):  
G. S. Allen
Keyword(s):  
Marked Effect ◽  
Relative Rate ◽  
Germination Rate ◽  
Tsuga Heterophylla ◽  
Germination Capacity ◽  
Factors Affecting ◽  
Seed Processing ◽  
Seed Maturity ◽  
Commercial Seed ◽  
Basic Studies

The following three papers show that both germination capacity and germination behavior are influenced markedly by maturity of cones and seed, and by various treatments, all of which can be controlled. Basic studies to discover the reasons for the radical changes in germination rate described herein are indicated.Commercial cone and seed processing often reduces germination capacity and increases the absolute or relative rate of germination. Dewinging, particularly if prolonged or if done in the presence of hard and sharp debris, has a marked effect upon both seed characteristics.High kiln temperatures (above 52 °C.), impact, and other "drastic" treatments reduce viability and increase germination rate. Seed that has been affected in these ways usually produces germinates whose radicles are discolored and subject to decay in the incubator. The seed itself tends to darken abnormally during stratification and/or incubation, and usually becomes contaminated quickly during incubation. Commercial seed that shows evidence of harmful treatment is usually dull and dusty and produces similar symptoms of weakness during incubation.

scholarly journals Testing of germination of spruce, pine and larch seed after 10 years from collection

2014 ◽  
Vol 60 (No. 12) ◽  
pp. 540-543
Author(s):  
I. Tomášková ◽  
J. Vítámvás ◽  
J. Korecký
Keyword(s):  
Czech Republic ◽  
Picea Abies ◽  
Pinus Sylvestris ◽  
Tree Species ◽  
Abiotic Factors ◽  
Forest Tree ◽  
Germination Capacity ◽  
The Czech Republic ◽  
Germination Energy ◽  
Seed Ageing

:Germination capacity and germination energy are usually the most frequently used quantitative parameters of forest tree seed. With seed ageing both parameters decreased and the rate of the collapse is given by tree species, age of tree and its seed and biotic and abiotic factors. Relatively little attention has been paid to the age of seed. As it was found, the longevity of the main tree species remained relatively high, and spruce (Picea abies [L.] Karsten and pines (Pinus sylvestris L.) from the investigated areas across the Czech Republic maintained minimally one third of germination capacity or germination energy during the 10 years with the exception of larch (Larix decidua Mill.) where germination capacity decreased almost to zero after 10 years. Although the germination energy and germination capacity decreased significantly, it is possible to use the seed in the case of shortage of the seed of better quality. &nbsp;

scholarly journals A simplified method for differential staining of aborted and non-aborted pollen grains

2010 ◽  
Vol 1 (2) ◽  
pp. 13 ◽  
Author(s):  
Ross Peterson ◽  
Janet P. Slovin ◽  
Changbin Chen
Keyword(s):  
Mercuric Chloride ◽  
Chloral Hydrate ◽  
Pollen Grains ◽  
Staining Technique ◽  
Field Studies ◽  
Differential Staining ◽  
Practical Applications ◽  
Time Period ◽  
Simplified Method ◽  
Pollen Vitality

The ability to use chemical staining to discriminate aborted from non-aborted pollen grains has well-known practical applications in agriculture. A commonly used technique for assessing pollen vitality, Alexander’s stain, uses chloral hydrate, phenol and mercuric chloride, all of which are highly toxic. We describe here an improved pollen staining technique that avoids the use of a regulated chemical chloral hydrate and two extremely toxic chemicals mercuric chloride and phenol, and requires a much shorter time period for sample preparation and staining. This simplified method is very useful for field studies without high-end equipments such as fluorescence microscopes. Samples can be collected and fixed in the fields and examined in a simple laboratory that has light microscopes.

EFFECT OF DIFFERENT DAMAGE FACTORS ON SOYBEAN SEED QUALITY

2001 ◽  
Vol 49 (2) ◽  
pp. 133-139 ◽  
Author(s):  
G. A. Lori ◽  
M. N. Sisterna ◽  
M. C. Rollán ◽  
R. A. Barreyro
Keyword(s):  
Buenos Aires ◽  
Seed Quality ◽  
Soybean Seed ◽  
Pathogenic Fungi ◽  
Poor Quality ◽  
Germination Capacity ◽  
Sample Analysis ◽  
Fungal Contamination ◽  
Anatomical Features ◽  
Seed Testing

Poor quality in soybean seed can be due to physiological, pathological or mechanical causes. Seed morphological and anatomical features also make soybean more susceptible to damage factors than other plant species. The purpose of this paper was to evaluate the effects of the different damage factors upon soybean seed quality and its longevity during storage. In two trials, carried out in La Plata (Prov. Buenos Aires, Argentina), soybean seed samples from 7 pre-trading lines, obtained in two consecutive crops, were analysed. Assessments were performed on day 40 and day 160 after harvesting for the first trial and on day 50 and day 150 after harvest in the second. The method employed was the blotter test, following the International Seed Testing Association (ISTA) rules. The parameters evaluated were: damaged cotyledons, rotten seed, fungal contamination and germination capacity. The damage factors had different influences on seed quality. The presence of pathogenic fungi did not necessarily mean low germination capacity. Their effect depended on the degree of infection, the presence of seed-borne pathogens and the time of sample analysis. Rotten seeds and damaged cotyledons caused by moisture had a striking influence on seed quality and preservation during storage.

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