Title |
Bee pollination and fruit set of Coffea arabica and C. canephora (Rubiaceae)
|
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Published in |
American Journal of Botany, January 2003
|
DOI | 10.3732/ajb.90.1.153 |
Pubmed ID | |
Authors |
Alexandra‐Maria Klein, Ingolf Steffan‐Dewenter, Teja Tscharntke |
Abstract |
Self-sterile Coffea canephora and self-fertile C. arabica are important cash crops in many tropical countries. We examined the relative importance of insect, wind, and spontaneous self-pollination and the degree of self-fertility of these two coffee species in 24 agroforestry coffee fields in Indonesia. In both species, open pollination and cross pollination by hand led to the highest fruit set. Wind pollination (including self-pollination) led to 16% lower fruit set than open pollination in C. canephora and to 12.3% lower fruit set in C. arabica. Self-pollinated flowers and unmanipulated controls achieved an extremely low fruit set of 10% or less in the self-sterile species, and of 60% and 48%, respectively in the self-fertile species. These results constitute experimental evidence that cross pollination by bees causes a significant increase in fruit set of not only the self-sterile, but also the self-fertile coffee species. The practical implication is that coffee yield may be improved by managing fields for increased flower visitation by bees. |
X Demographics
Geographical breakdown
Country | Count | As % |
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Germany | 2 | 67% |
El Salvador | 1 | 33% |
Demographic breakdown
Type | Count | As % |
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Members of the public | 2 | 67% |
Scientists | 1 | 33% |
Mendeley readers
Geographical breakdown
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United States | 4 | 1% |
Uganda | 1 | <1% |
Chile | 1 | <1% |
France | 1 | <1% |
Côte d'Ivoire | 1 | <1% |
Brazil | 1 | <1% |
Australia | 1 | <1% |
Argentina | 1 | <1% |
Serbia | 1 | <1% |
Other | 0 | 0% |
Unknown | 300 | 96% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Researcher | 55 | 18% |
Student > Master | 51 | 16% |
Student > Bachelor | 43 | 14% |
Student > Ph. D. Student | 38 | 12% |
Professor | 22 | 7% |
Other | 42 | 13% |
Unknown | 61 | 20% |
Readers by discipline | Count | As % |
---|---|---|
Agricultural and Biological Sciences | 167 | 54% |
Environmental Science | 44 | 14% |
Earth and Planetary Sciences | 4 | 1% |
Biochemistry, Genetics and Molecular Biology | 4 | 1% |
Unspecified | 4 | 1% |
Other | 19 | 6% |
Unknown | 70 | 22% |