Evolutionary history of callose synthases in terrestrial plants with emphasis on proteins involved in male gametophyte development
Fig 4
Callose synthase expression profiles in Nicotiana tabacum male gametophyte.
A) Expression profile of five male gametophyte-expressed CalS mRNAs during pollen development and progamic phase, B) Distribution of transcripts encoding three most abundant tobacco pollen CalS mRNAs (CalS5, CalS10, CalS12) between actively translated polysomal and storage EPP fractions. UNM, uninuclear microspore; early BCP, early bicellular pollen; late BCP, late bicellular pollen; MPG, mature pollen grain; PT4, 4h pollen tubes; PT24, 24h pollen tubes; EPP, mRNA storage EPP complexes; POL, polysomal fraction.