Floral Biology of Jojoba (Simmondsia chinensis), an Anemophilous Plant

Persistent Link:
http://hdl.handle.net/10150/554232
Title:
Floral Biology of Jojoba (Simmondsia chinensis), an Anemophilous Plant
Author:
Buchmann, Stephen L.
Affiliation:
USDA Agricultural Research Service; Department of Ecology and Evolutionary Biology, University of Arizona
Publisher:
University of Arizona (Tucson, AZ)
Journal:
Desert Plants
Rights:
Copyright © Arizona Board of Regents. The University of Arizona.
Collection Information:
Desert Plants is published by The University of Arizona for the Boyce Thompson Southwestern Arboretum. For more information about this unique botanical journal, please email the College of Agriculture and Life Sciences Publications Office at pubs@cals.arizona.edu.
Issue Date:
1987
Abstract:
Simmondsia chinensis is a widespread perennial plant native to the Sonoran Desert of the United States and northern Mexico. Individuals are dioecious with small unisexual flowers borne on separate plants. The plants are strictly wind-pollinated (anemophilous). Honey bees (Apis mellifera) and native bees often collect large amounts of pollen from male plants but are never found visiting female plants, as there are no floral attractants or rewards in the form of volatiles or nectar, in the green apetalous female flowers. Male plants produce copious amounts of pollen, up to an estimated 523 g/plant, [0.5-2.4 mg/flower, or 8.3-48.9 mg/inflorescence]. Per anther there are from 11,000 to 18,000 pollen grains. The pollen is small, smooth with little exine sculpturing and averages 34μ in equatorial diameter. There is almost no surface oily pollenkitt on the grains. Anthers dehisce and pollen is shed during the entire day, but with an early afternoon peak from 1300 to 1500 MST. This corresponds to peak atmospheric concentrations of 60-63 grains/cubic meter during this period. Seasonal data for Jojoba aerial pollen concentrations and selected hourly values for certain days are also presented for 1982 and 1983 in a native stand. Data on floral number, floral ontogeny, stigmatic receptivity, and seeds per fruit, are also presented for Jojoba.
Type:
Article
ISSN:
0734-3434

Full metadata record

DC FieldValue Language
dc.contributor.authorBuchmann, Stephen L.en
dc.date.accessioned2015-05-19T20:48:58Zen
dc.date.available2015-05-19T20:48:58Zen
dc.date.issued1987en
dc.identifier.issn0734-3434en
dc.identifier.urihttp://hdl.handle.net/10150/554232en
dc.description.abstractSimmondsia chinensis is a widespread perennial plant native to the Sonoran Desert of the United States and northern Mexico. Individuals are dioecious with small unisexual flowers borne on separate plants. The plants are strictly wind-pollinated (anemophilous). Honey bees (Apis mellifera) and native bees often collect large amounts of pollen from male plants but are never found visiting female plants, as there are no floral attractants or rewards in the form of volatiles or nectar, in the green apetalous female flowers. Male plants produce copious amounts of pollen, up to an estimated 523 g/plant, [0.5-2.4 mg/flower, or 8.3-48.9 mg/inflorescence]. Per anther there are from 11,000 to 18,000 pollen grains. The pollen is small, smooth with little exine sculpturing and averages 34μ in equatorial diameter. There is almost no surface oily pollenkitt on the grains. Anthers dehisce and pollen is shed during the entire day, but with an early afternoon peak from 1300 to 1500 MST. This corresponds to peak atmospheric concentrations of 60-63 grains/cubic meter during this period. Seasonal data for Jojoba aerial pollen concentrations and selected hourly values for certain days are also presented for 1982 and 1983 in a native stand. Data on floral number, floral ontogeny, stigmatic receptivity, and seeds per fruit, are also presented for Jojoba.en
dc.language.isoen_USen
dc.publisherUniversity of Arizona (Tucson, AZ)en
dc.rightsCopyright © Arizona Board of Regents. The University of Arizona.en_US
dc.sourceCALS Publications Archive. The University of Arizona.en_US
dc.titleFloral Biology of Jojoba (Simmondsia chinensis), an Anemophilous Planten_US
dc.typeArticleen
dc.contributor.departmentUSDA Agricultural Research Serviceen
dc.contributor.departmentDepartment of Ecology and Evolutionary Biology, University of Arizonaen
dc.identifier.journalDesert Plantsen
dc.description.collectioninformationDesert Plants is published by The University of Arizona for the Boyce Thompson Southwestern Arboretum. For more information about this unique botanical journal, please email the College of Agriculture and Life Sciences Publications Office at pubs@cals.arizona.edu.en_US
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