Genome-wide analyses of cassava. - BMC Genomics.
A two-year field trial was conducted to study the effects of prolonged water stress on cassava (Manihot esculenta) productivity, and on nutrient uptake and use efficiency.Four contrasting cultivars were supplied with adequate fertilization and watering, except when water was excluded by covering the soil with plastic sheets for different periods, depending on treatment: from two to six months.
Disease of specimen a are cassava mosaic, leaf spot, root knot e.t.c Characteristics Of Specimen A (a) Possession of notes.
FLOWERING PLANTS These are plants that bear flowers. A typical flowering plant is composed of 2 systems: Root system Shoot system The two systems are made up of two categories of organs i.e. Reproductive organs: these produce fruits and seeds. They are directly involved in the reproduction of the plant. Vegetative organs: these are not directly involved in the reproduction. They include roots.
The difference between Monocot and Dicot stems is that monocot stems are unbranched and fleshy. They are usually weak and do not grow thicker from year to year. Dicot stems are usually tough and will grow thicker every year. The purpose of the vascular tissues within the plant vary. The epidermis serves as the outer layer which protects the cells within the stem. The cortex is made up vascular.
Unlike the leaves of eudicots, most monocot leaves: a) undergo secondary growth. b) have veins containing xylem and phloem. c) have veins arranged in a branching pattern. d) have netted venation.
Dicot and Monocot Leaves Angiosperm leaves have many shapes and sizes (see Photographic Atlas of Plant Anatomy by Curtis,. In general, dicot leaves exhibit net veination and have a differentiated mesophyll with a palisade layer associated with the adaxial (generally upper) surface and a spongy layer associated with the abaxial (generally lower) surface as shown below in the Ligustrum leaf.
The number of cotyledons (seed leaves) distinguishes whether a seed is a monocot or dicot.Monocots have one cotyledon and dicots have two.Monocot plants are characterized by having parallel veins and thin, strap-like leaves. Examples of monocot plants include grass, daylilies, corn, and coconuts.