Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- adjective Of or relating to an organism, especially a plant, in which the male reproductive organs mature before the female reproductive organs.
- adjective Of or relating to the earlier arrival of males than of females at a breeding site.
from The Century Dictionary.
- In botany, same as
proterandrous .
from the GNU version of the Collaborative International Dictionary of English.
- adjective (Bot.) Proterandrous.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- adjective biology Exhibiting
protandry . - adjective botany Whose male parts (
anthers ) becomesmature before the female ones (stigma ). - adjective botany Whose male parts (
antheridia ) release theirspermatozoids before the female parts (archegonia ) mature.
Etymologies
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Examples
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Tree R 5 T 27 an open pollinated seedling of Crath No. 23, is protandrous, but later flowering than the Colby with respect to pistils as well as catkins, and consequently most of its pistillate flowers fail to set fruit in years like 1951 when there was no later Persian walnut pollen available.
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Tree R 5 T 27 an open pollinated seedling of Crath No. 23, is protandrous, but later flowering than the Colby with respect to pistils as well as catkins, and consequently most of its pistillate flowers fail to set fruit in years like 1951 when there was no later Persian walnut pollen available.
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Busseron was found to be a protandrous variety, shedding most of its pollen, and in some years all of it, before the period of receptivity of its pistillate flowers.
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Mr. Reed listed as protandrous Busseron, Kentucky, Major, and Niblack varieties, whereas Butterick, Indiana, and Posey were protogynous.
pgayed commented on the word protandrous
The word protandrous can also refer to the same phenomenon in the hermaphrodite form of the worm Caenorhabditis elegans, which matures and releases large sperm loads before development of its oocytes.
December 10, 2010