HUBUNGAN FAKTOR ABIOTIK TERHADAP JUMLAH KLOROFIL DAN STOMATA (EKOFISIOLOGIS) PADA TANAMAN JATI (Tectona grandis L.f.) DI KABUPATEN MALANG

Climate change due to increasing earth temperature is predicted to escalate plant stress
chances. Changes in temperature followed by humidity changes will affect plant physiology,
including the stomata index and chlorophyll. Both parts are essential for the photosynthesis
process in the plant. This study aimed to determine whether abiotic factors influenced the
physiological conditions of teak plants. Leaf samples were taken from six trees selected
based on tree height (11-13 meters). Leaf samples were taken in the same direction north
and south, 18 for the stomata sample and 18 for the chlorophyll sample, with three samples
for the stomata and chlorophyll in each tree. Temperature and humidity observations were
carried out for two months. The analysis used in this study was SEM-PLS analysis using
warpls software. The results showed that temperature had a positive effect on the stomata
index of 0.746. The significant negative effect was indicated by the effect of temperature on
chlorophyll a, humidity on chlorophyll b and humidity on total chlorophyll with values of
0.571, -0.688 and -0.614, respectively. The reduced environmental temperature has caused
a reduction in photosystem activity, resulting in excessive chlorophyll production. The
remedial solution is silvicultural techniques application in an appropriate plant spacing to
reduce temperature and increase the humidity of the microclimate in the area.