To answer the question regarding the number of prothallial cells present in the male gametophytes of Pinus, we can follow these steps: Step 1: Understand the Male Gametophyte StructureThe male gametophyte of Pinus, which is a type of conifer, develops from pollen grains. Each pollen grain con...
A mature male gametophyte is formed from pollen mother cell by View Solution How many pollen grains are formed from 10 microspore mother cells by meiosis View Solution A fertilized egg of a plant has 40 chromosomes. The number of chromosomes present in the microspore mother cell is View Solution...
In isolated condition, the sperm cells of Spinacia oleracea are no longer arranged in pairs as in the pollen grain. The vegetative membrane, which surrounds a sperm cell pair in a mature pollen grain, is lost during the isolation procedure. The sperm cells become spherical in shape.The ...
In such seeds, the cotyledons or first seed leaves become quite large and accumulate the reserves that will be mobilized later in germination. Reserves may take the form of intracellular oil droplets (for example, the sunflower), protein bodies (beans), and starch grains (cereals), or ...
tod1 is defective in in vivo pollen tube growth To investigate the cause of male sterility, mature pollen grains were stained with Alexander’s stain and with 4′,6-diamidino-2-phenylindole (DAPI) and analysed by microscopy. The cytoplasm of tod1 pollen was red purple after Alexander’s stai...
To produce grains, rice pistils, which house ovules, require pollen for the successful fertilization process. The expression profile of rice pistils' cells is largely unknown. Through droplet-based single-nucleus RNA sequencing, we characterize a cell census of rice pistils before fertilization. In...
This is a normal developmental process by which the WT anther produces mature pollen grains. However, in the ms33-6038 anther (right of Supplemental Figure 14D), loss of ZmMs33 function leads to greatly decreased contents of lipid components that are crucial to the integrity and function of ...
invasion of pollen tubes into intracellular spaces of the transmitting tract involves secretion of extracellular matrix-loosening enzymes [58]. For instance, xylanases released from pollen grains and expansins secreted by the growing tube help to drill a passage through the cell walls of the transmit...
The two types of vacuoles co-exist in the same cells for a short time and may also be present in cells at different stages of development7–9. The complex fusion of PSV membranes and the changes in the vacuole content lead to the establishment of LVs10. In recent years, the origin of...
Isolation of spinach sperm cells:1:Ultrastrucure and three-dimensional construction in the mature pollen. Wilms H J,Leferink-ten Klooster H B,Van Aelst A C. Biotechnology and Ecology of Pollen . 1985Wilms H J,Leferink-ten Klooster H B,Van Aelst A C.Isolation of spinach sperm cells:1:...