xylem is an example of monocot showing secondary growth in stem.
xylem is an example of monocot showing secondary growth in stem.
an example of monocot showing secondary growth in stem is?
xylem
ancestral monocots lost their secondary growth and their stele has changed in a way it could not be recovered without major changes that are very unlikely to occur. monocots either have no secondary growth, as is the ancestral case, or they have an "anomalous secondary growth" of some type, or, in the case of palms, they enlarge their diameter in what is called a sort of secondary growth or not depending on the definition given to the term. palm trees increase their trunk diameter due to division and enlargement of parenchyma cells, which is termed "primary gigantism" because there is no production of secondary xylem and phloem tissues, or sometimes "diffuse secondary growth". in some other monocot stems as in "yucca" and "dracena" with anomalous secondary growth, a cambium forms, but it produces vascular bundles and parenchyma internally and just parenchyma externally. some monocot stems increase in diameter due to the activity of a primary thickening meristem, which is derived from the apical meristem.
secondary growth
vascular bundles are present throughout the monocot stem, although concentrated towards the outside. this differs from the dicot stem that has a ring of vascular bundles and often none in the center. the shoot apex in monocot stems is more elongated. leaf sheathes grow up around it, protecting it. this is true to some extent of almost all monocots. monocots rarely produce secondary growth and are therefore seldom woody, with palms and bamboo being notable exceptions. however, many monocot stems increase in diameter via anomalous secondary growth.









































section::::stem structure.:gymnosperm stems.
plant stem