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- Author or Editor: H. James Price x
- HortScience x
Abstract
Plant growth and quality were determined for 2 species of schefflera grown under 3 production light levels and 2 fertilizer treatments. High production light (828 μE m−2s−1) resulted in better growth of Brassaia actinophylla Endl. but generally had no effect on the growth parameters of Schefflera arboricola Hayata ex. Kanehira. Increasing fertilizer levels decreased plant growth and quality for S. arboricola in the production phase but caused no difference for B. actinophylla. However, after 3 months in an interior environment, B. actinophylla produced under the highest light level and S. arboricola produced under the lowest light level (276 μE m−2s−1) maintained better growth and plant quality. Both species receiving the lowest fertilizer treatment (200 mg N/pot·week) were better in growth and quality after 3 months indoors in contrast to the highest fertilizer treatment (400 mg N/pot·week).
Abstract
Brassaia actinophylla Endl. was larger in growth and better in quality when produced under 828 and 414 μE m−2s−1. Schefflera arboricola Hayata ex Kanehira increased in growth and quality when produced under 414 and 276 μE m−2s−1. Both species increased in growth and generally maintained good quality after a post holding period in an interior environment. Plants produced under the lower production light levels maintained good growth after 3 months indoors under interior light levels of 24, 16 and 8 μE m−2s−1. S. arboricola maintained better quality than B. actinophylla when hdd under the lowest interior light level.
To our knowledge, there has been no published technique to produce consistently high-quality slides of somatic chromosomes of roses (Rosa sp.). Therefore, various pretreatments, fixatives, digestions, stains, and maceration and squashing methods were tested to identify a procedure to produce clear, well-spread chromosomes from shoot tips. The best results were obtained after pretreatment in a mixture of 0.1% colchicine and 0.001 m 8-hydroxyquinoline for 4 h, and fixation in 2 acetone: 1 acetic acid (v/v) with 2% (w/v) polyvinylpyrrolidone. The darkest-stained chromosomes were obtained with carbol-fuchsin staining of air-dried cell suspensions that had been spread in 3 ethanol: 1 acetic acid (v/v).