复数： calluses calli

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Study on callus induction and bud differentiation of gerbera .

非洲菊愈伤组织诱导和不定芽分化研究。

This callus generally lasts for about three weeks .

一般来说这种痂能够存留大约三星期。

Callus hairs equal to or slightly longer than lemma .

胼胝体毛等于或稍长于外稃。

To have a callus on your foot .

脚上磨有老茧。

Callus induction and protoplast culture from immature embryo of maize .

玉米未成熟胚愈合组织之诱导及原生质体之分离与培养。