Safety is a basic need of people. Studies show that people who. are continually subjected to stressful situations are more. susceptible to psychosomatic illnesses. Even though it is. possible to adapt to extreme situations over the long term, they. will place a great strain on the individual.
As dendrochronologists, we are more interested in the fusiform initials. The fusiform initials produce secondary xylem and secondary phloem (the xylem and phloem produced during secondary growth). When we study wood or tree rings, we are looking at secondary xylem.As the fusiform initials divide, they produce secondary xylem towards the inside of the cell and secondary phloem towards the outside. Therefore, the vascular cambium (where we find the fusiform initials) is considered to be bifacial.s dendrochronologists, we are more interested in the fusiform initials. The fusiform initials produce secondary xylem and secondary phloem (the xylem and phloem produced during secondary growth). When we study wood or tree rings, we are looking at secondary xylem.
In herbaceous dicot stems, the vascular system makes a ring, with the phloem to the exterior and xylem to the interior. In woody dicot plants, the rings grow to make a complete ring around the stem. Xylem growth makes the âannual ringsâ used to tell a treeâs age.In woody dicot plants, water and mineral movement occurs in the more recent years of xylem rings.igure 3. Cross section of dicot stems: Left: herbaceous dicot stem (vascular bundles are arranged in a circle) Right: woody dicot stem (phloem and xylem make complete rings around the stem). Figure 4. Cross section of woody dicot stems is used in identification. The pith may be solid, colored, hollow or chambered.