MATERIALS AND METHODS
Young grafted longkong seedlings (about 60 cms. high) grown in soils of 10 inches diameter plastic bags
were placed under 4 different light shading conditions of salan plastic nets, 100%, 55%, 40% or 25% of full sun (6
plants each treatment). After the treatments for 10 months, three mature grown leaves in each treatment were
sampling to study leaf structure by hand sectioning. The light response curves of three mature grown leaves in each
treatment (except 40% of full sun) were also investigated by using Licor-6400. Growth parameters were recorded
after the plants were under the treatment conditions for two years. Leaf area was measured by LI-3000A Area
Meter.