Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Agron 334 F13 Plant anatomy and morphology (29 Aug)
Document related concepts
no text concepts found
Transcript
Agron 334 F13 Plant anatomy and morphology (29 Aug) Reading assignment: Forages: Chap 2 and 3, pp. 25-27 Supplemental: Forages I Ch 4; Forages II Ch 2 & 3 Alfalfa Plant Development How does plant anatomy and morphology relate to forage management and utilization? Non-structural carbohydrates Structural carbohydrates Primary cell wall Cellulose Hemi-Cellulose Secondary cell wall (with maturity and Lignification) Lignin Digestion Model Vegetative Development Meristems: area of actively dividing cells, undifferentiated cells capable of enlarging or differentiating into specialized tissue. Growth is localized in the meristems, growing point is not the only merited Growth can be defined in several ways: Meristems: Apical axillary intercalary marginal meristems lateral meristems Stems: Morphology of grasses Tillers, erect, vertical stems Internode length variable. Stolons - horizontal stems, above ground Rhizomes - horizontal stems, below ground, Roots: sod forming grasses sod density is related to the number of rhizomes length of the internodes is variable short internode length -- Examples longer internode length -- Examples Haplocorms Bulbs Stem morphology of dicots Generally, the terminal buds are well above the soil surface Stems -- erect (upright ); terminal buds at the top of the canopy prostrate or ‘’trailing along the ground’ -- may or may not root at nodes terminal buds lower in the canopy Nutritive value of stems ? Leaves: Nutritive value of leaves ? Leaf area index — LAI - sum of the surface area of all leaves per unit of ground Why should a producer care about the LAI of a field of forage crops? Can LAI be managed? =================================== Anatomy & Morphology – Key Points Know the important structural and non-structural carbohydrates in forages and their relative Bio-availability Be able to discuss the ‘Digestion Model’ diagram Know and be able to discuss the 5 types of meristems found in forage plants and their management Know the morphology (plant parts) of grasses & legumes What is LAI? Be able to discuss its importance in forage management.
