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Postpollination Phenomena in Orchid Flowers. VIII. Water and Dry Weight Relations
Abstract
Pollination causes increases in FW [fresh wt] and DW [dry wt] of Cymbidium ovaries and gynostemia. It also initates FW losses in perianth segments. Auxin (NAA) [naphthaleneacetic acid] applications to the stigma have the same effects except that FW of ovaries decreases. All segments of unpollinated flowers increased in DW, whereas FW variations were minimal. These weight changes reflect the aging and subsequent death and/or redifferentiation and further development of pollinated and/or unpollinated orchid flowers.
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