#clonal

[whats-in-a-sentence]

One set of superficial initials gives rise to a clonally distinct epidermal layer, termed L1, while more internal sets of of initials give rise to the subepidermal L2 later and a centrally positioned L3 layer (see Figures 17.25B and 17.26).

"Plant Physiology and Development" int'l 6e - Taiz, L., Zeiger, E., Møller, I.M., Murphy, A.

[victusinveritas]

[antiqueanimals]

The Seashore. Written by Jennifer Cochran. Illustrated by Kenneth Lilly, Patricia Mynott, James Nicholls, and George Thompson . 1973.

Internet Archive

[otaku553]

[balkanradfem]

i have seen old tjikko - a clonal tree that's the most recent of several genetically identical trees that have been growing in the same spot for nearly 10 000 years. it likely sprouted for the first time very shortly after the ice receded from that part of sweden.

unh I love her

[eggtrolls]

Invasive species of the day is: Japanese knotweed!

Japanese knotweed (Reynoutria japonica; Japanese name is 虎杖) is a perennial, clonal plant in the knotweed/buckwheat family native to Japan, Korea, and China. Reaching a maximum height of 3-4 m (10-13 ft), it forms dense thickets of canes which are hollow like bamboo (but not related), although plants that have been cut/mowed have shorter and thinner stems that are no longer hollow - neat, eh? It was introduced from East Asia as an ornamental plant and to help stabilize streambanks. The young stems are edible as an early spring vegetable and taste a lot like rhubarb with a lemon twist so it is actually cultivated for food in some places where it is both native and invasive. Its flowers also apparently make great honey, similar to buckwheat honey.

As an invasive species, holy shit. Japanese knotweed is basically Godzilla – one forest restoration old-hat told me that it is the toughest invasive species to deal with which is why it is also called Godzilla weed. "Fast-growing" is an understatement – this plant can grow up to 30 cm (6 inches) PER DAY and it will grow in the most mediocre soils on the planet. It's also nearly impossible to remove by the roots, which can extend about 7 m (23 ft) horizontally and 3 m (10 ft) deep. That root system can survive salt, temperatures as low as -40, and will damage retaining walls; if you leave a few centimeters of root it will start to reshoot. You literally cannot kill it in any way that matters. Controlling it, for those of us without a backhoe or heavy chemical weaponry, is a matter of controlling the above-ground shoots for years to weaken and kill the entire patch, while trying futilely to do something about the roots. Be careful how you dispose of it though – in the UK, knotweed is classified as controlled waste and its disposal is regulated by law. There's a whole discussion to be had on the effects of Japanese knotweed on home mortgages in the U.K. (?) but I'll skip that.

Bonus – remember how I said it was imported to help with streambank stabilization? It's actually really bad at doing that compared to native vegetation AND it worsens water quality. Suffice to say, this guy sucks and all my friends hate him.

[sitting-on-me-bum]

Worker ants tend to pupae and small larvae in a colony of clonal raider ants, Ooceraea biroi.

PHOTOGRAPH BY DANIEL KRONAUER

[crosswordgf]

❣️❣️❣️❣️

[leam1983]

I'm guessing this is what it feels like to be one of the handful of sentient creatures Ents tolerate around Fangorn. You're just some dude living your life in accordance to Tolkien's weird lifespan estimates for Men, and the thing that gives you a placid nod is practically as old as Arda itself.

[whats-in-a-sentence]

These cells grow relatively normally but can be easily recognized by their increased nuclear volume and cell size (Figure 17.26).

"Plant Physiology and Development" int'l 6e - Taiz, L., Zeiger, E., Møller, I.M., Murphy, A.

[badolmen]

bwa

[raskies456]

So researchers recently found out that one of the secrets of Roman concrete that makes it so incredibly durable is the presence of lime clasts, which are little chunks of lime (a family of Calcium Oxide/Hydroxide minerals). People used to dismiss the clasts as a defect, since lime is pretty fragile and reacts with water.

However, that turned out to be the point. When looking at the lime clasts’ microscopic features, they realized that the clasts would have to have formed under high heat, and were specifically made out of quicklime (CaO) which is more reactive. The heat allowed the quicklime clasts to take on specific properties, including being extremely brittle, and this seemed to be purposeful.

But why would they want extra brittle and reactive lime clasts in the concrete? It turns out the clasts are what give Roman concrete the ability to self repair, sealing up minor cracks when they form. When the concrete cracks, it will crack through the lime clasts, because the lime is far more brittle than the rest of the concrete. Then, when water flows into the cracks, it starts to dissolve the lime before eventually crystalizing as calcium carbonate inside the cracks. This seals the cracks automatically!

If you want to know more, this is a good article on the research and how they tested and figured this out!

i dont care about the movies. or the shows. i dont see or look at tem. Can we talk about something else like the trees or concrete mixing methods

[lupinus-bicolor]

Shout-out to my brother for getting the coolest fucking pictures of my garden ever. wtf

[agroemdia]

Produtores e empresas paraenses conhecem o Cupuaçu 5.0

Kit clonal, com as novas cultivares de cupuaçuzeiro desenvolvidas pela Embrapa, apresenta alta produtividade e sanidade, com boa resistência à vassoura-de-bruxa

Foto: Ronaldo Rosa/Embrapa/Divulgação Um dia de campo na cidade de Tomé-Açu, no nordeste paraense, apresentou a produtores, técnicos, gestores públicos, empresas privadas e instituições de ensino e pesquisa, o kit clonal Cupuaçu 5.0, com as novas cultivares de cupuaçuzeiro desenvolvidas pela Embrapa, para alta produtividade e sanidade, com boa resistência à vassoura-de-bruxa. No ano em que a…

[considered-the-tetrapod]

These fuckers! I'm pretty sure that's a pyrosome, and if so they're tubular (literally) colonies of hundreds to thousands of little guys that are able to jet siphon their way around. Some species can be 20m long and are bioluminescent! Nature is wild

Can we like. Talk about this.