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Table 2 Female gametophytic defects in the Atmnd1 mutant.

From: AtMND1 is required for homologous pairing during meiosis in Arabidopsis

Ovule Stages 1n 2n 4n 8n MES Degen
  m + m + m + m + m + m +
3-1 31 100 ND ND ND ND ND ND ND ND 69 ND
3-2 25 60 9 40 ND ND ND ND ND ND 66 ND
3-4 39 2 4 40 7 52 ND 5 ND ND 50 0.8
3-6 32 ND 6 2 0.4 7 0.2 7 0.6 83 60 1.2
  1. Stages of female gametophyte development relative to ovule stages in the Atmnd1 mutant and wild type. A total of 759 and 637 ovules were scored for the Atmnd1 mutant and wild-type respectively. Megagametogenesis defects are evident from stage 3-1 in case of the mutant, which leads to embryo sac arrest and eventually its degeneration. Ovule stages are according to [54]: 3-1, 3-2, and 3-4 are postmeiotic stages of the sporophyte with respect to elongation of the integuments where the wild type gametophyte would normally reach the 1n, 2n, and 4n stages; 3-6 corresponds to a mature ovule prior to fertilization. MES, Mature embryo sac; Degen, Degenerated embryo sac; M, mutant; +, wild type; ND, Not detected.