Pollen is produced in the microsporangia in the male cone of a conifer or other gymnosperm or in the anthers of an angiosperm flower. Pollen grains come in a wide variety of shapes, sizes, and surface markings characteristic of the species (see electron micrograph, right).
In gymnosperms pollen is produced in microsporangiate cones (male cones or pollen cones), while in angiosperms pollen is produced in the anthers (part of the stamen within the flower). Each pollen grain typically consists of one to a few cells.
One may also ask, what is pollen made of? Pollen is a fine powder made up of microspores produced by male plants. It is also called flower sperm. Pollen carries the male gametes (reproductive cells) of seed plants. Seed plants include both conifers (plants whose seeds grow inside cones) and flowering plants.
Pollen is actually small spores that come from male trees and flowers. We often see the catkens (the remainder of the male part of the flowers and trees) that cover our cars, windows, and sidewalks making travel difficult for allergy sufferers. There are generally two kinds of pollen : Sticky Pollen.
Pollen grains may not look like much; to the naked eye, they often look like dusty specks, but upon closer inspection, they take an endless array of fascinating shapes with all manner of textures and features.
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Treatments for pollen allergies include:Over-the-counter antihistamine medications, such as cetirizine (Zyrtec) or loratadine (Claritin). Immunotherapy tablets or shots to desensitize the body to pollen. Nasal sprays designed to relieve the itching and congestion.
Pollen is a plant's male DNA that is transported to the female part of the flower to enable the plant to reproduce. Because pollen contains DNA, it can be used to change a plant's traits. Such changes can increase harvest production or help a plant survive in a specific environment.
Yes and no. With the aid of a compound microscope, the pollen grains of different plant types can be differentiated allowing scientists to study the number and types of pollen grains released into the air. Masses of pollen are visible to the naked eye on the end of a stamen of a tulip or other flowers.
The ragweed pollen season usually ends by mid-November in most areas of the country. If you have fall allergies and react to fungi and molds, you probably face your worst symptoms in late summer and early fall.
Reduce your exposure to allergy triggersStay indoors on dry, windy days. Delegate lawn mowing, weed pulling and other gardening chores that stir up allergens. Remove clothes you've worn outside and shower to rinse pollen from your skin and hair. Don't hang laundry outside — pollen can stick to sheets and towels.
Pollen is a fine to coarse powdery substance comprising pollen grains which are male microgametophytes of seed plants, which produce male gametes (sperm cells).
The grains of pollen are often located in pollen sacs on the ends of the stamen (the male parts of the flower), which typically surround the carpel (the female parts of the flower).
Which Plants Make the Most Pollen? Trees like oak, ash, elm, birch, maple, alder, and hazel, as well as hickory, pecan, and box and mountain cedar. Grasses like Timothy, Kentucky blue grass, Johnson, Bermuda, redtop, orchard grass, sweet vernal, perennial rye, salt grass, velvet, and fescue.
Allergies cause symptoms that happen all at once. Check how long the symptoms last: Cold symptoms generally last 7 to 10 days, whereas allergy symptoms continue with exposure to the allergen (symptom trigger). Allergy symptoms may get better or go away soon after elimination of allergen exposure.
To do this for pollen, scientists sequence the DNA from a genetic region known to occur in all plants, but which varies from species to species. Pollen grains produce the male reproductive cells (sperm) of the plant. Each pollen grain has a tough outer layer called the exine, made of a protein called sporopollenin.
Yes, allergies can make you feel tired. Most people with a stuffy nose and head caused by allergies will have some trouble sleeping. But allergic reactions can also release chemicals that cause you to feel tired. A lack of sleep and constant nasal congestion can give you a hazy, tired feeling.
Tree pollen occurs first, typically from late March to mid-May, and affects around 25% of people. Most people are allergic to grass pollen (which actually has two peaks) and the season lasts from mid-May until July. Weed pollen can be released at any time but the season typically covers the end of June to September.
Pollen germination Another germination event during the life cycle of gymnosperms and flowering plants is the germination of a pollen grain after pollination. Once the pollen grain lands on the stigma of a receptive flower (or a female cone in gymnosperms), it takes up water and germinates.
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