In order for a seed to germinate, many conditions must be met. Firstly a seed must be viable. If a seed is viable it require a suitable environment with proper levels of moisture, suitable temperatures, oxygen, fertile soil, and proper pH levels to name a few. However, as many of us have experienced, some viable (living) seeds will NOT germinate, even when given the perfect conditions. In the field of botany, this phenomenon is known as “physiological seed dormancy” (will be referred to as PSD from here on out). In plain language, PSD is like a “hibernation” stage that occurs after seed maturation but before germination.
After the seeds of a mother plant mature, they respond to environmental cues that signal the end of the growing season is near and begin PSD (hibernation). If the seed did not enter this dormancy phase, it would attempt to grow as soon as it reached maturity in the flower of the mother plant. As everyone knows, seeds in the wild do not germinate in the Fall Season because they would soon die during the coming winter months. So it is advantageous for seeds temporarily inhibit the process of germination because it increases their chances of survival and eventual hopes of maturing to breed. Different species of plants use different mechanisms remain in PSD. In botany, PSD can be broken down into two broad categories: Embryo Imposed Dormancy and Seed Coat Imposed Dormancy.
There are many variants to Embryo Imposed dormancy, but the most common and best understood mechanism involves the hormone Abscisic acid (referred to ABA from here on out). The mechanism by which ABA works is pretty complicated without a background in genetics and biology, (inhibits promoter region of genes in plant DNA that would otherwise res...
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...lute the perceived concentration of ABA. As ,mentioned before, I purposely didn’t go into too much detail here because most people know about soaking seeds in water and scarification. I just included it here to give a scientifically explanation as to exactly HOW these methods work. It still all boils down to ABA.
I brought up these topics before in a previous post with links to books and websites, but I decided to put it all into one place for others to read. If this helps people out, I can go into more details on plant physiology. I have a really extensive background in biology, chemistry, organic chemistry, genetics, physics, botany, pharmacology, medicine and science in general. So if you have questions feel free to ask. Ill probably be posting more info on plant physiology in the future if I find anything useful related to cannabis. Peace and much love!!
RastaLee
Hallucinogens prevent the brain from receiving all of these messages in order. All of the information that we receive is through millions of transactions of neurons, like a computer, marijuana alters these transactions. After smoking, or consuming marijuana, it is distributed in the brain. The concentration of marijuana in the brain may be governed by an active transport process in the choroid plexus network of blood vessels in the brain which regulates intraventricular pressure by absorption and secretion of cerebro spinal fluid. One scientific experiment gave an example of how the distribution of marijuana in the central nervous system could affect man.
The experiment was designed to test the hypothesis by planting an increasing number of genus Helianthus (sunflower) seeds in pots to see how they respond to increased density in limited space. Two replicates each of 2, 4, 8, 16, 32, 64, and 128 seeds were planted in similar size pots containing an equal mix of potting soil and perlite. All plants were kept in greenhouse conditions exposed to similar light and temperatures settings and were watered at equivalent intervals. At the end of the time period each pot was evaluated for number of seeds that had germinated as well as number of stems with blooms. Stems and blooms were cut and weighed.
The germinating seeds consumed almost no oxygen throughout the experiment in the 10-degree C water bath. I think that this is because when an organism cools down, all of its cellular functions slow down.
Germinating tobacco seeds are a very delicate thing to do. Seeds are spread out on the surface of a seedbed to be nursed until they are strong enough to be out in a field. The “nursery” takes about 2 months of supervising the growth of the plant and to control diseases and pests (Akehurst, 1968). Before replanting in a field, producers have to assess a field site. There needs to be a reliable
Storing seeds will allow you to save some money for future planting use. If all goes right, you may even have more seeds than you could ever need in a season!
The Physiological Effects of Marijuana Marijuana derives from the dried leaves and flower of the hemp plant Cannabis sativa; for thousands of years, physicians regarded marijuana as a useful pharmaceutical agent that could be used to treat a number of different disorders. In the 19th century, physicians in the United States and Europe used marijuana as an analgesic, as a treatment for migraine headaches, and as an anticonvulsant (Grinspoon & Bakalar, 1993, 1995). In 1938, a physician used marijuana (hashish) to completely control the terror and excitement of a patient who had contracted rabies (Elliot, 1992, p. 600).
Two members of the group were instructed to visit the laboratory each day of the experiment to water and measure the plants (Handout 1). The measurements that were preformed were to be precise and accurate by the group by organizing a standardized way to measure the plants. The plants were measured from the level of the soil, which was flat throughout all the cups, to the tip of the apical meristems. The leaves were not considered. The watering of the plants took place nearly everyday, except for the times the lab was closed. Respective of cup label, the appropriate drop of solution was added to the plant, at the very tip of the apical meristems.
First off it is important to understand the effects of cannabis use and its history. When smoking cannabis THC is the leading stimulant released.
H1 Buy Seeds Online throughout Australia Growing plants from seeds is rewarding and fun, whether you do it as a hobby or to access hard to obtain varieties or to save money. Seeds are an opportunity to create many plants at low cost, and high reward. Growing from seeds ensures the seedlings are perfectly suited to your region and conditions as they have a chance to acclimatise from germination. We do always recommend seed starter to ensure high results from germination.
Earlywine, Mitchell. A. Understanding Marijuana: A new look at the scientific evidence. New York: Oxford University Press. 2002. The.
Savannah said, “I wouldn’t be able to get into college.” I told her to plant her seed. Breanna got a little off track and said, “I always have problems with procrastination or speeding up and not getting the work done or just speeding up and not looking at everything.” This was not the direction I was looking for but decided to continue on and see how it played out, so I had Breanna plant her seed as well. When Savanah T was asked if she had any self-doubts she said “no.”
Some plants have a dormancy during which almost all activity ceases, or the only growth that happens is below the ground in the root zone. However, Venus Flytraps continue to grow and to pho...
be shown just what parts of the body marijuana effects and how it effects them.
In seedless watermelons, rudimentary seed structures form but remain small, soft, white, tasteless and undeveloped tiny seed coats that are eaten virtually undetected along with the flesh of the melon. Seed production for these seedless types is an extremely labor intensive process that makes the seeds relatively expensive. Because germination of these types is often less vigorous than normal types, it is recommended that they be started in peat pots or other transplantable containers. Here the germinating conditions can be closely controlled. Once transplanted, cultivation is similar to that for regular watermelons.
These seeds were germinated for around five to ten days, depending on the conditions applied. The reasoning behind the germination conditions is not fully explained. After germination, all parts of the plant, including the germinated seeds, cotyledons, plumules, hypocotyls and radicles were separated from one another to be tested. The main methods used for this study were ELISA and Western blot analysis.