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Table 1 The pollen viability and stigma receptivity of T. sinense

From: Floral biology, breeding system and pollination ecology of an endangered tree Tetracentron sinense Oliv. (Trochodendraceae)

Developmental stage of flower Pollen viability/% Stigma receptivity
Sepal opening 32.65 ± 1.91 ++/--
Stigma reflexing 30.63 ± 1.70 +++/-
Stamens on the right and left of flower elongating 36.44 ± 2.71 +++/-
Dehiscence of anthers on the right and left 62.47 ± 1.89 ++++
Stamens on the upper and lower of flower elongating 55.35 ± 2.64 +++/-
Dehiscence of anthers on the upper and lower 47.02 ± 2.32 ++/- -
  1. Note: '++++’ showing the stigma receptivity is the highest; '+++/-’ showing the receptivity of some stigmas is stronger and another is weaker; '++/--’ showing some stigmas have receptivity while another have no receptivity.