(1) Cytyledons and future stalk called the hypocotyl elongate.

(2) The epidermal cells of the proximal end of hypocotyl of Sagittaria sag-ittifolia L. differentiate into trichoblast before seed germination.

(3) Among cotyledon , petiole of cotyledon, hypocotyl, and radicle, hypocotyl has the most responsive explants to 2, 4 - D .

(4) At the onset of germination, the hypocotyl elongates rapidly by cell enlargement.

(5) Hypocotyl of Cucumis melon L. can be induced to occur adventitious root on 1/4 MS solid medium.

(6) When hypocotyl emerges out of the seed coat for 1 - 2 mm.

(7) The radicle and hypocotyl length and number of lateral roots increased with increasing germination time and decreased with increasing ploidy.

(8) The transformation frequency of flax hypocotyl was about 2 %.

(9) The content of tannin in episperm was the highest, the hypocotyl and endocarp followed.

(10) The paper also reports, for the first time, a phenomena of direct formation of adventive shoots from hypocotyl explant of sunflower.

(11) The morphogenetic potential of such explants as leaf pieces and hypocotyl segments from aseptic seedlings of Stylosanthes guianensis cv. Reyan 2 was investigated in this study.

(12) Based on the results of these transgenic studies, it indicated that FIN219 acts as a positive regulator to transduce FR-mediated inhibition of hypocotyl elongation.