Differences in chlorophyll fluorescence and chlorophyll content of broccoli associated with maturity and sampling section
Peter M. A. Toivonen and Jennifer R. DeEll
Postharvest Biology and Technology. Volume 14, Issue 1, September 1998, Pages 61-64.
1998
บทคัดย่อ
The effect of broccoli maturity on chlorophyll fluorescence measurements was assessed using product supplied by a local commercial producer/shipper. Two categories of maturity were selected: (1) optimum maturity; and (2) overmature heads. Fluorescence measurements were taken on both floral and stalk sections of the broccoli. Fo (minimum fluorescence) appeared to correlate with chlorophyll content in floral tissue only. The kinetic parameters Fv/Fm (Fv=Fm-Fo; Fm=maximum fluorescence) and T1/2 (half-time (ms) for the rise in Fv) were similar for both maturities but were significantly different when comparing floral and stalk sections. The results of this study indicate that chlorophyll fluorescence measurements of broccoli are independent of head maturity, suggesting that this technique would be reliable if used for assessment of broccoli condition in the commercial industry.