In flowering plants, the megagametophyte (also referred to as the embryo sac) is much smaller and typically consists of only seven cells and eight nuclei. This type of megagametophyte develops from the megaspore through three rounds of mitotic divisions.t consists of three parts: The integument(s) forming its outer layer(s), the nucellus (or remnant of the megasporangium), and female gametophyte (formed from haploid megaspore) in its center. The female gametophyteâspecifically termed a megagametophyte âis also called the embryo sac in angiosperms.
Late winter or early spring is the best time to begin spraying an apple tree. Using horticultural oil spray helps to destroy any insects and their eggs on the tree before new growth begins.
The majority of apple tree (Malus) blossoms begin as pink buds and bloom as white flowers.A handful of cultivars, however, have flowers that retain some or all of their pink hues past the bud stage. All apple trees perform best when they receive full sun exposure and have well-drained soil with a pH level of 5 to 7.ala. The apple tree cultivar Gala is from New Zealand and produces light-pink flowers that turn into orange and red fruits. A cross between Kidd's Orange Red and Golden Delicious, Gala has rich and flavorful apples that are candidates for juicing.