Ma. Koukourikoupetridou, ETIOLATION OF STOCK PLANTS AFFECTS ADVENTITIOUS ROOT-FORMATION AND HORMONE CONTENT OF PEA STEM CUTTINGS, Plant growth regulation, 25(1), 1998, pp. 17-21
Stock pea plants (Pisum sativum L.) were etiolated fully or partially
at the third internode that acted as the cutting base. The etiolation
started the fifth day after sowing and lasted till cutting preparation
. Cuttings derived from partially etiolated plants rooted more than no
n-etiolated ones while fully etiolated ones rooted more only after tre
atment with 1 % sucrose solution for 4 days. Endogenous IAA in the bas
e of etiolated cuttings was higher during the first 24 h after cutting
preparation than in the control. Z/ZR did not show significant differ
ences while iAde/iAdo was higher in the control. Ethylene was increase
d 24 h after cutting preparation and the increase was greater from par
tially etiolated cuttings. The results showed that besides IAA and cyt
okinins, which played a role in the rooting of cuttings, sucrose influ
enced rooting in the case of fully etiolated stock plants.