TY - JOUR
T1 - Diurnal variation in settling velocity of pollen released from maize and consequences for atmospheric dispersion and cross-pollination
AU - Chamecki, Marcelo
AU - Gleicher, Simone C.
AU - Dufault, Nicholas S.
AU - Isard, Scott A.
N1 - Funding Information:
This work was in part supported by the USDA-NIFA-Plant Biosecurity Program grant 2009-55605-05049. The authors are grateful to Timothy Grove, Katelyn Johnson, and Karen Bunavage for their assistance during the field work.
PY - 2011/8/15
Y1 - 2011/8/15
N2 - Settling velocity of maize (Zea mays L.) pollen plays an important role in its dispersal and, therefore, cross-pollination. Estimated probability density functions (PDFs) of settling velocity based on experimental measurements show strong variation between early morning and noon. The variation is correlated to the time-integrated vapor pressure deficit (VPDT) and reflects the drying of pollen grains. A model for the decrease in germination rate of pollen grains exposed to atmospheric conditions suggests that the decrease in settling velocity is accompanied by a decrease in pollen viability. A simple dispersion model is used to illustrate the possible consequences of changes in settling velocity and germination rate for pollen dispersal and cross-pollination of maize. Results suggest that current models of pollen dispersal that do not account for these changes overestimate cross-pollination rates.
AB - Settling velocity of maize (Zea mays L.) pollen plays an important role in its dispersal and, therefore, cross-pollination. Estimated probability density functions (PDFs) of settling velocity based on experimental measurements show strong variation between early morning and noon. The variation is correlated to the time-integrated vapor pressure deficit (VPDT) and reflects the drying of pollen grains. A model for the decrease in germination rate of pollen grains exposed to atmospheric conditions suggests that the decrease in settling velocity is accompanied by a decrease in pollen viability. A simple dispersion model is used to illustrate the possible consequences of changes in settling velocity and germination rate for pollen dispersal and cross-pollination of maize. Results suggest that current models of pollen dispersal that do not account for these changes overestimate cross-pollination rates.
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U2 - 10.1016/j.agrformet.2011.03.009
DO - 10.1016/j.agrformet.2011.03.009
M3 - Article
AN - SCOPUS:79957497524
SN - 0168-1923
VL - 151
SP - 1055
EP - 1065
JO - Agricultural and Forest Meteorology
JF - Agricultural and Forest Meteorology
IS - 8
ER -