Summary of variance analysis of plant height (H), stem diameter (SD), leaf dry mass (LDM), stem dry mass (SDM), shoot dry mass (SHDM), principal root dry mass (PRDM),
secondary root dry mass (SRDM), total root dry mass (TRDM), total dry mass (TDM), shoot height: diameter ratio (SHDR), shoot: root ratio (SRR) and quality index of Dickson (DQI) of mangosteen seedlings grown on different substrates at 240 DAP.
Only rotten and necrotic
secondary roots were subjected to the genomic DNA extraction.
Secondary roots that emerged from any of the five primary roots and had a diameter thicker than 2.0 mm were also recorded.
Key words: primary root,
secondary root, root sprouting, hypogeous germination, Premontane humid tropical forest, Costa Rica.
*
Secondary root. The
secondary root arises from the primary root.
(2002) have demonstrated that root elongation and
secondary root formation of white clover (cv.
Yet the set is placed on an incline to cause one end (the head) to be the source of leaves and the other end (the tail) to be the source of
secondary roots. When the first leaves have broken through the ground, laborers walk the fields with hoes gently lifting the head of the set, breaking small
secondary roots that had sprouted at that end but leaving them at the tail.
Seedlings grown in the high light treatments had greater mean root lengths, primary root dry weights and
secondary root dryweight (Table 2 c) than those grown in low light treatments.
Maximum rate of
secondary root emergence was recorded from seeds coated with 2.0 g B followed by 1.0 and 1.5 g B kg-1 seed, while other treatments i.e.