ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Influence of spectral filters on growth and postharvest quality of potted miniature roses.

Rajapakse, N. C.; Kelly, J. W.;

Scientia Horticulturae Year: 1993 Vol: 56 Issue: 3 Pages: 245-255 Ref: 20 ref.

1993

บทคัดย่อ

The role of light quality on growth and postharvest characteristics of potted miniature roses (cv. Meijikatar) was evaluated using 6% CuSO4 and water (control) as spectral filters. The CuSO4 spectral filters reduced R and FR wavelengths and increased the R:FR, B:FR and B:R ratios and Pfr/Ptot (o) of transmitted light compared with the control filter. Light transmitted through the CuSO4 filter significantly reduced plant height and internode length and increased the number of lateral shoots compared with control plants. However, the degree of response varied with growing season. CuSO4 filters slightly accelerated flowering in early spring-grown plants but slightly delayed flowering in late spring and summer. Total number of flowers was not affected by spectral filter but plants grown under the control filter had larger flowers than those grown under the CuSO4 filter. Light transmitted through the CuSO4 filter reduced leaf sucrose and starch concentrations by 40% and 65%, respectively. Leaf glucose and fructose concentrations were not affected by light quality. Postharvest quality of plants grown under CuSO4 and control filters was reduced and leaf yellowing increased as the shipping temperature increased. Light quality in the growing environment did not significantly reduce the overall appearance of plants shipped at 4 deg or 15 deg C. However, plants grown under CuSO4 filter had slightly higher percentages of yellow leaves than the corresponding control plants after shipping at any temperature.