Lora Et Al., Bicellular and Tricellular Pollen in Annona Cherimola the Coexistence of Bicellular and Tricellular Pollen in Annona Cherimola Mill. (annonaceae): Implications for Pollen Evolution

نویسندگان

  • J. LORA
  • M. HERRERO
  • J. I. HORMAZA
چکیده

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The progamic phase of an early-divergent angiosperm, Annona cherimola (Annonaceae)

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PREMISE OF THE STUDY A variety of mechanisms to prevent inbreeding have arisen in different angiosperm taxa during plant evolution. In early-divergent angiosperms, a widespread system is dichogamy, in which female and male structures do not mature simultaneously, thus encouraging cross pollination. While this system is common in early-divergent angiosperms, it is less widespread in more recentl...

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تاریخ انتشار 2009