Seed set variation in wild
            Clarkia
            populations: teasing apart the effects of seasonal resource depletion, pollen quality, and pollen quantity

One honeybee or bumblebee working on each square metre of white clover or red clover gave adequate pollination. This could be obtained with one hive of honeybees to each three hectares of flowering clover. Lucerne seeding averaged only 10% of the potential maximum in open fields with honey- or bumblebees. In cages where honeybees were forced to gather pollen, this was raised to 30% but it was not possible to increase seed set significantly in the fields.

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Hand-Pollination ofCardamine californicaImproves Seed Set

Native Plants Journal ◽

10.2979/npj.2006.7.3.248 ◽

2006 ◽

Vol 7 (3) ◽

pp. 248-252 ◽

Cited By ~ 2

Author(s):

Kazuki Ariyoshi ◽

Emily Magnaghi ◽

Mark Frey

Keyword(s):

Seed Set ◽

Hand Pollination

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DETERMINATION OF AFTER-RIPENING PERIOD AND HORMONAL RESPONSE OF OROBANCHE SOLMSII C.D. CLARKE SEEDS

Ecoprint An International Journal of Ecology ◽

10.3126/eco.v11i1.149 ◽

1970 ◽

Vol 11 (1) ◽

Author(s):

A. Bista ◽

G. B. Khattri ◽

B. D. Acharya ◽

S. C. Srivastava

Keyword(s):

Growth Hormone ◽

Seed Germination ◽

Key Words ◽

Incubation Period ◽

Seed Set ◽

Summer Season ◽

Conditioning Period ◽

Root Parasite ◽

One Year

To find out the ability of Orobanche seeds to germinate immediately after seed set, seeds were germinated periodically at an interval of three months for one year in GR24. Some Orobanche seeds were capable of germination immediately after seed set but most required about nine months as after ripening or incubation period to be able to germinate. The phenomenon of after ripening in Orobanche seeds could be taken as an ecological measure to dormant over following unfavorable wet summer season. The growth hormone studies on Orobanche seed germination have shown that GA3 at a concentration of 100 ppm substantially enhanced seed germination when applied during pre-conditioning period. NAA showed some stimulatory effect at 0.5 - 1.0 ppm when applied during post-conditioning period but the hormone if applied during pre-conditioning period inhibited the germination. Kinetin failed to stimulate the germination at all the concentrations tested. Key words: Germination, root-parasite, hormone. Ecoprint Vol.11(1) 2004.

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Study on floral traits and seed setting in parental lines of hybrid rice during early ahu and kharif seasons

Indian Journal of Genetics and Plant Breeding (The) ◽

10.31742/ijgpb.78.3.2 ◽

2018 ◽

Vol 78 (3) ◽

Author(s):

Aradhana Phukan ◽

P. K. Barua ◽

D. Sarma ◽

S. D. Deka

Keyword(s):

Seed Set ◽

Flag Leaf ◽

Pollen Dispersal ◽

Pollen Sterility ◽

Leaf Length ◽

Floral Traits ◽

Opening Angle ◽

Leaf Angle ◽

Seed Setting ◽

Parental Lines

Two CMS lines, IR 58025A and IR 68888A along with their maintainers and two fertility restorers, LuitR and IR 36R, were evaluated for flower and plant characters during early ahu (February-June) and kharif (July-November) seasons. IR 58025A showed longer stigmata and styles, and higher spikelet Length/Breadth (L/B) ratio while IR 68888A showed broader stigmata and wider glume opening angle in both the seasons. IR 68888A also exhibited higher pollen sterility during early ahu. IR 36R was characterized with broad anthers. LuitR showed longer and broader anthers with more pollen than others. Plant height, flag leaf length, flag leaf width and area were higher in IR 36R. Panicle exsertion was complete in pollen parents whereas it was 78-80% in CMS lines. The widest flag leaf angle was found in IR 58025B during early Ahu and in IR 36R during kharif. Kharif season was more favourable for growth of the plants with higher seed set percentage while floral traits of the CMS lines were better expressed in early Ahu. Manipulation of the seeding sequence of the parental lines in early Ahu is warranted for better seed set provided the seed crop escapes heavy premonsoon showers during reproductive stage. IR 68888A/LuitR was a good combination for pollen dispersal and seed setting.

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Classification and Seed Set of Varied Embryo Sacs of Autotetraploid Rice*

Chinese Journal of Appplied Environmental Biology ◽

10.3724/sp.j.1145.2009.00021 ◽

2010 ◽

Vol 2009 (1) ◽

pp. 21-27

Author(s):

Wenbo LONG ◽

Shengbin TU ◽

Li LUAN ◽

Xing WANG ◽

Fanlun KONG ◽

...

Keyword(s):

Seed Set ◽

Autotetraploid Rice

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