Unlike other gymnosperms, Gnetum possesses vessels in its xylem, a characteristic typically associated with angiosperms. Vessels enable efficient water transport and represent an advanced evolutionary trait. This makes Gnetum an exceptional case among gymnosperms.
LIST I (Photoperiodism) | LIST II (Explanation) |
---|---|
A. Short Day Plants (SDP) | I. Dark period period of 14-16 hours |
B. PR | II. Absorbs light at 730-735nm |
C. Long Day Plants (LDP) | III. Daylight of about 14-16 hours |
D. PFR | IV. Absorbs light at 660-665nm |