organism: Betula platyphylla
attributes.tag: isolate
attributes.value: repeat1 wild type male inflorescences
attributes.tag: age
attributes.value: 20 year old
attributes.tag: dev_stage
attributes.value: mature microspores before the pollination stage
attributes.tag: collection_date
attributes.value: 2018-04-22
attributes.tag: geo_loc_name
attributes.value: China:Harbin city, Heilongjiang
attributes.tag: tissue
attributes.value: Male inflorescence
attributes.tag: BioSampleModel
attributes.value: Plant