Microcallus growth from maize protoplasts.

Abstract:

:Maize (Zea mays L.) protoplasts obtained from Type I and Type II calli from several genotypes were shown to be capable of synthesizing cell walls and forming small clusters of cells. The medium used also supported cluster formation from protoplasts obtained from root tips. The effects of various additions to the medium (such as casein hydrolysate, coconut water, amino acids, sugars, phytohormones, nitrate, calcium, and dimethylsulfoxide as well as pH variations on cellcluster formation were determined. The method of culture (protoplasts plated in agarose or supported in alginate beads in liquid medium) as well as several components of the medium were found to be critical for microcallus formation. Protoplasts obtained from embryogenic Type I callus and cultured in the medium of C. Nitsch and J.P. Nitsch (1967, Planta 72, 355-370) modified by various additions (NN 67-mod medium) were affected most by various sugars, casein hydrolysate, coconut water, and a combination of the auxins napthalene-1-acetic acid (2 mg/l) and 2,4-dichlorophenoxyacetic acid (0.1 mg/l), and the cytokinin N(6)-benzylaminopurine (0.5 mg/l). Cluster size in the agarose culture system was from 0.1 to 0.5 mm diameter and in the alginate culture system, up to 2.0 mm diameter.

journal_name

Planta

journal_title

Planta

authors

Imbrie-Milligan C,Kamo KK,Hodges TK

doi

10.1007/BF00395067

subject

Has Abstract

pub_date

1987-05-01 00:00:00

pages

58-64

issue

1

eissn

0032-0935

issn

1432-2048

journal_volume

171

pub_type

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