Ripe Seed of McIntosh Apples

1965 ◽  
Vol 13 (2) ◽  
pp. 137-139 ◽  
Author(s):  
A. B. Durkee ◽  
P. A. Poapst
Keyword(s):  
Ripe Seed

scholarly journals Effect of desiccation temperature on viability of immature dandelion (Taraxacum agg.) seeds dried in mowed inflorescences

2010 ◽  
Vol 56 (No. 12) ◽  
pp. 580-583 ◽  
Author(s):  
Z. Martinková ◽  
A. Honěk
Keyword(s):  
Seed Dispersal ◽  
High Temperatures ◽  
Seed Viability ◽  
Late Summer ◽  
Seed Maturation ◽  
Ripe Seed ◽  
Viable Seeds

After flowering has ceased, dandelion (Taraxacum agg.) capitula close to enable maturation of seeds. In late summer the period of seed maturation lasts for 9 days. The capitula mowed later than 4 days after the start of this period and desiccated at 25°C produce viable seeds. If cut and prostrated on insolated ground inflorescences can experience temperatures exceeding 50°C which may impair seed viability. We determined the effect of desiccation temperature (5, 15, 25, 35, 45 or 55°C) on viability of ripening seeds using inflorescences harvested on September 5, 2008 at Prague-Ruzyne (50°05'N, 14°18'09 E), five days after flowering ceased (about 4 days before seed dispersal). As control, ripe seeds were collected at dispersal on the same day and desiccated at identical temperatures. Desiccated seeds were germinated at constant 17°C. Ripening seeds of maturing capitula only remained germinable if desiccation temperatures were ≤ 35°C (optimum 25°C) and were killed at 45 and 55°C. The viability of ripe seed was not affected by any of the desiccation temperatures. Time of germination of 50% seeds that germinated was significantly shorter in ripe than ripening seeds. Exposure of mowed dandelion inflorescences on insolated ground (solarization) may thus decrease production of viable seeds because of high temperatures experienced during desiccation.  

scholarly journals PERSILANGAN INTERSPESIFIK ANGGREK HITAM (Coelogyne pandurata) DENGAN ANGGREK MUTIARA (Coelogyne asperata)

2017 ◽  
Vol 4 (1) ◽  
pp. 102
Author(s):  
Ni Wayan Deswiniyanti ◽  
Ni Kadek Dwipayani Lestari
Keyword(s):  
Seed Germination ◽  
Plant Breeding ◽  
Female Parent ◽  
In Vitro Method ◽  
Ripe Seed ◽  
Cross Compatibility ◽  
Commercial Purpose ◽  
Good Quality Seed ◽  
Propagation Material

Black orchid (Coelogyne pandurata) and Pearl orchid (Coelogyne asperata) are endemic orchid from Kalimantan forest, shape and color suitable as ornamental flower. Many people collected the orchids from the wild for commercial purpose but not much effort on their propagation. To prevent population decreased, propagation and production of new varities via interspesific hybridisation need to be done. An important step required in plant breeding is to obtain cross compatiblity. Cross compatibility of some orchids from Indonesia are not known, including compatibility of Coelogyne pandurata x Coelogyne asperata. Information on compatibility and fertility is very important to produce good quality seed as propagation material. In this research pollination was performed on orchid plants at 2 until 5 day after flowering and pollination was done in the morning. There are three replicates for each pollination.  Pollination was done with C. pandurata (black orchid) as male parent and C. asperata (pearl orchid) as female parent. The results showed that successful pollination was obtained from pollination at 2 days after flowering. Seed capsule was harvested at 3 months after pollination but not yet perfectly ripe. Seed germination employed in vitro method on Vacin & Went (VW) and VW with modification media. Seed from C. pandurata x C. asperata abled to germinate on VW media with addition of 0,1 mg/l auxin and 0.1 mg/l cytokinin and germinated 9 weeks after planting.

Isolation, Validation and Characterization of Major Bioactive Constituents from Mango Ripe Seed

2017 ◽  
pp. 273-311 ◽  
Author(s):  
Kalpna D. Rakholiya ◽  
Mital J. Kaneria ◽  
Sumitra V. Chanda
Keyword(s):  
Bioactive Constituents ◽  
Ripe Seed

scholarly journals Fatty Acid Composition of Ripe Seed Oil of Nyctanthes Arbor-tristis L.

2011 ◽  
Vol 35 (1) ◽  
pp. 121-124 ◽  
Author(s):  
Mohammad Mizanur Rahman ◽  
Sudhangshu Kumar Roy ◽  
Mohammad Shahjahan
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Oleic Acid ◽  
Fatty Acid ◽  
Acid Composition ◽  
Seed Oil ◽  
Acid Value ◽  
Major Constituent ◽  
Ripe Seed ◽  
Academy Of Sciences

The fatty acid composition of the ripe seed oil of Nyctanthes arbor-tristis L. (Bengali: Seuli) were determined by GLC. The major constituent of the oil was found to be stearic acid, 39.06%. The relative percentages of other major fatty acids were found to be lauric acid, (4.46); linoleic acid, (7.89); oleic acid, (7.97). The yield of the seed oil was found to be 7.29% on extraction with pet-ether (b. p. 40°C - 60°C). Acid value of seed oil was found to be 55.44 and suggests that this oil is inedible.DOI: http://dx.doi.org/10.3329/jbas.v35i1.7977Journal of Bangladesh Academy of Sciences, Vol.35, No.1, 121-124, 2011

scholarly journals Effects of Fruit Maturity, Storage, Presoaking, and Seed Cleaning on Germination in Three Species of Palms

1987 ◽  
Vol 5 (1) ◽  
pp. 6-9 ◽  
Author(s):  
T.K. Broschat ◽  
H. Donselman
Keyword(s):  
Gibberellic Acid ◽  
Immature Seed ◽  
Ripe Fruit ◽  
Ripe Seed ◽  
Fruit Maturity ◽  
Polyethylene Bags ◽  
C 73 ◽  
Time Of Harvest

Green, half ripe and ripe fruit of queen [Arecastrum romanzoffianum (Cham.) Becc.], pygmy date (Phoenix roebelenii O'Brien) and royla palms [Roystonea regia (HBK) O. F. Cook] were cleaned or left uncleaned and were presoaked in 1000 mg/1 gibberellic acid (GA,) for 48 hr, water for 48 hr, were not presoaked. Queen palm seed germinated best if cleaned green or half-ripe seed was used, but pygmy date and royal palm seed germinated best when cleaned half-ripe or ripe seed was used. Cleaned seed of these palms can be stored in sealed polyethylene bags at 23°C (73°F) for 4 to 9 months. Depending on the species, and royal palm seed benefited from storage of up to 9 months, presumably due to immature seed embryos at time of harvest.

Contributions to the biology of Mulga. I. Flowering

1971 ◽  
Vol 19 (1) ◽  
pp. 21 ◽  
Author(s):  
PB Preece
Keyword(s):  
Water Stress ◽  
Seed Set ◽  
Late Summer ◽  
Wide Distribution ◽  
Ripe Seed ◽  
Experimental Area ◽  
Severe Water Stress ◽  
Additional Water ◽  
The Subject ◽  
Acacia Aneura

In spite of its wide distribution in arid Australia and its importance to the pastoral industry, mulga (Acacia aneura Benth.) has not been the subject of any detailed investigations to determine the climatic requirements for regeneration. An investigation of these requirements for flowering and seed set, in which trees growing in the field were given additional water for a period of 12 months, showed that flowering occurred several times in the year but that the principal flowerings were in spring and late summer. It was not shown definitely that rain was necessary to bring about flowering at these seasons, although the results suggested that flowering was heavier and seeding more successful when additional water, or good rains, reduced the normally severe water stress. Of the two principal flowering seasons, only the late summer one led on to seed set and the shedding of ripe seed. From rainfall records and values for the climatic requirements derived from observations made during the investigation, it was estimated that seed could have been set successfully once every six years in the experimental area since records began around 1890.

On the result of crossing round with wrinkled peas, with especial reference to their starch-grains

1908 ◽  
Vol 80 (537) ◽  
pp. 122-135 ◽  
Keyword(s):  
Real Character ◽  
Starch Grains ◽  
Especial Reference ◽  
The Real ◽  
Ripe Seed ◽  
Intermediate Condition ◽  
Starch Grain ◽  
Do So

One of the characters with which Mendel dealt in his hybridisation experiments with peas was, as is well known, the shape of the ripe seed. Weldon, in his criticism of Mendel’s interpretation of his results, showed that round were not discontinuously distinct from wrinkle peas, but that intermediate shapes connecting these two extremes were not infrequently exhibited. The answer which was made to Weldon’s criticism was that the intermediate shapes were due to spurious pitting or dimpling of the seed, and did not represent an intermediate condition of the germ which gave rise to them. And this answer was shown to be correct by the work of Gregory, who found that the starch-grains of round and wrinkled peas were quite distinct, and that they afforded an infallible test by which the real character of a pea with doubtful shape could be determined. Our knowledge of this subject has not advanced beyond the stage reached by Gregory in 1903; that is to say, we know no more about the inheritance of wrinkledness and roundness than Mendel did, except that each of these two characters is associated with a particular kind of starch-grain. What is the nature of the starch-grain in the hydrid; and how the characters of the starch-grains segregate, if they do so at all, in subsequent generations, are points on which we are at present ignorant. The observations, which I have to record, form the first instalment of an attempt to fill up this gap in our knowledge.

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