Is there any scientific fact for stressing plants in flowering stage to produce more trichomes?

Bem acho que está tudo dito, aqui por pessoal. Única coisa que posso dizer com toda a certeza, minhas experiências. Clone x Clone mesma mãe, corte, transplante, vaso... tudo igual até dia de ir para rua. 1 colocando em rio, temperatura e humildade perto do ideal. 2 colocado em nacente em Serra a 800 a 1000 metros de altitude, calor baixa humidade e frio nas noites de flor. Clones plantados e lá ficam até fim da época. Clone 1 grande mais de 2 metros de altura, erva vulgar. Clone 2 pequeno com pouco mais que 0,70, erva top, cheio sabor pedra tudo 10 x melhor. Contra 10x menos rendimento. Saudações feliz crescimento

Good answer by numbers. Any time I have seen my plants stressed by pests outdoors they 100% get more frosty but they are also stunted and don't get as big as the ones with no pests so yield was down by a lot. My limited experience with this was with a few autos and aphids. So grain of salt with that. I;ve also use some products that are said to stimulate the defence system of the plant and make more trichomes but I never did a side by side to see if it really did anything and to add insult to injury I also used seeds and they can be varied a lot. Plus their are things we do unintentionally that cause the plant stress and we just don't think about it. so no need to add any more into the mix willenily. Don't over think it. KISS is a great method.

Uv light at 280nm in moderate doses increases density as a protection method from excessive dmg. Expensive and costly to maintain. Requires a little know how or you will scorch the earth though.

Mostly it's word of mouth. People are extremely susceptible to confirmation bias, on average. Mix in a little ego, and they think anything they do 'definitely improved the results" despite a small sample size and never comparing it to a control group. this is how we end up with myths like defoliation for the sake of defoliation, flushing at end of harvest and other bro-science concepts. I've grown stuff caked in trichomes and stuff less densley populated with trichomes... it's genetics. simple as that. there is no magic bullet to polish a turd. Even if it does help, the effect is something tiny even if it is measurable.. e.g. CCT.. yes it does measurably impact resulting shape of plant in a statistically significant way (less or more bushy etc), but the effect is small. it is never, ever going to convert a short bushy plant into a lanky one or vice versa. Most of the bro-science out there isn't even proven to be a small, statistically significant effect. it's just gossip and people too full of themselves to admit that the human senses and a sample size of a few plants with no control group is not going to result in a confident conclusion about anything. Keep the plant healthy and happy and if it has the genes to do so, it'll be high quality. What we impact is a small portion of the total beyond that. Try things one at a time with clones, if you want. take good notes. create a confident baseline expectation with them doing things in an orthodox way, first. This can be your control quasi-group. If you have seasons, that's going to throw a wrench into such plans as your enviornment chaning will fuck up what you see as far as comparing apples to apples. In my experience, the gimmicks and over-sophisticaited stuff is not worth it. the people saying things like "you have no idea what you are talking about" clearly have never learned about teh scientific method or taking any type of advanced science education. in the one study mentioned, it doesn't really fully flesh it out. What is the cost of this stress? do you lose 10% of yield for a 1% increase in trichomes? it doesn't really prove anything specific. Also, 90% of intial studies are later proven false or not repeatable. so, you always need a preponderance of data to be confident about such things. can stressing it create trichomes? maybe... but even if that is true there are other aspects to consider as to whether it is worth it. As above, i simply say... Keep It Simple, Stupid... KISS Principle.

Shinsimilla all I'm saying is I haven't seen any notable difference between non stressed trichome production and stressed trichome production. Obviously I haven't had lab samples done to check the difference but from a visual inspection I haven't seen any difference. The one think I have seen through stress is the plant throwing out nanas or hermie. Let's not get into a debate about it and let's see what others think about stressing the plant out in flower will do.

It's clear people don't understand the functions of a trichome on a plant. They are the plant's protection to certain stresses and those stresses can and do make your plant produce more trichomes. Trying to recreate these indoor is not wise, but it is a proven fact. This is text below is from https://bmcplantbiol.biomedcentral.com/articles/10.1186/s12870-021-02840-x Biological functions of plant trichomes Plants have evolved many defense mechanisms to protect against different abiotic and biotic stresses. The morphology and density of trichomes influence several aspects of plant physiology and ecology by mediating the interactions between the plant and its environment [18]. Trichomes, along with the stomata, cutin and wax on the epidermis, performed various protective functions through synthesizing, storing and secreting many important substances [19,20,21]. The cotton petal trichomes maintain the shape of the buds and ensure the production of seeds [22]. In addition, trichomes protect plants from herbivores, insects and pathogens by secreting repellents, alkaloids and toxic substances [21, 23,24,25]. Kim et al. (2011) examined the relationship between pepper trichomes and pepper mottle virus (PepMov) resistance and showed that the resistance to PepMoV-SNU1 strain is inherited by cross combinations among pepper cultivars CM334, Chilsungcho and ECW123R [15]. In rice, two TRICHOME BIREFRINGENCE (TBR)-like proteins play an essential role in the resistance to leaf spot disease [26]. Trichomes are also important in the response to abiotic stress [22]. The presence of trichomes increases the thickness of the epidermis, and the content of long-chain fatty acids is significantly higher than that in other epidermal cells, which is helpful to reduce evaporation and regulate temperature [20, 27]. In Brazil’s high-altitude rocky areas, the plants of Croton tiglium and Vriesea effectively absorb moisture and nutrients from the atmosphere through trichomes to improve water and fertilizer utilization [28, 29]. The high-density multi-branched Acanthophyllum squarrosum trichomes not only have high resistance to sand burial, but also reduce mechanical damage by wind and sand [30]. In addition, the trichomes of an aquatic plant, Salvinia molesta, play a hydrophobic role in maintaining normal respiration [14]. Trichomes also function in signal transmission. The cell wall of Arabidopsis trichomes gradually thins from the top to bottom, and this change makes the base of the trichomes extremely sensitive to external stimuli. The stimulation is transmitted to cells around the base of trichomes through changes in Ca 2+ content and pH, thereby regulating the synthesis of defensive substances [31, 32].

I wouldn't say by stressing a plant it would produce more trichomes. One thing that could happen is stressing her out during flower could cause her to go hermie. I stress mine a little in flower but that's usually because I have to bend the colas to stop them hitting the light, if I had the space I'd not stress them at all.

Organoman has no idea what he's talking about. Trichomes are the plants protection, there are definitely small stresses that get them to produce more resin. It has been proved many times.

Stress is bad.........period. Stress to do magical things to potency is pure ghetto scienceIt goes to reason, that a happpy and helthy plant with the least amount of stress is able to produce the healthiest and best quality trichomes. I have been growing for forty years now and have tried all sorts of weird suggestions and there is nothing that produces the best buds than a healthy, happy and stress free plant. A plant can only produce the maximum amount of THC/trichomes that its genetic code is programmed to do. Nothing can change this. A stress free plant is best able to express this genetic potential.

Hey, Very light stresses can be good, but you need to understand why the trichomes are there to use the right stresses. If you don't know what you're doing, I would not advise this, because it is very easy to stress the plant in a way that will have a detrimental effect. If you do it well, you might get a tiny bit more resin, but if you mess up you could end up with a lot less. The trichomes are a protective barrier for the plant, so light stress from UV, heat, wind, bugs can get the plant to produce more resin to try to keep the flowers safe. When you grow outdoor these stresses are always there. I would not try to recreate these stresses indoor. Something to keep in mind is that nothing you do to the plant with a quick easy trick will make it better. You need good genetics and just to look after the plant well. That is the best way to get the best out of the plant. Any of these 48h dark or ice in the pot are not magically overnight going to give you more trichomes. Good genetics can have many times the resin of low quality genetics. If you want more resin buy seeds that will double or triple your resin, trying to stress a plant for not even 1% more is not the way.