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Do all flora possess the capacity to be cloned or viably reproduced from their trimmings, offcuts, and so on?

Or is this trait exclusive to certain varieties; or specific (cultivars) taxa?

voices
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2 Answers2

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The term you need is actually 'vegetatively propagated' rather than 'cloned'. The answer is, essentially, yes, by and large, almost all plants can be vegetatively propagated, though different parts of the plant may be used and the methods used will vary, along with the level of difficulty. Parts which can be used include leaves, stems, shoots, bulbs, rhizomes, stolons, buds and so on.

'Clone' means an exact duplicate of the parent plant, but where plants are chimeric (variegated Sansevieria, for instance) leaf cuttings, whilst they certainly produce new plants, are very unlikely to be variegated, so the cuttings are not clones, though they are vegetatively propagated. Equally, if you took a cutting from a rose and grew it on, it would not be a clone of its parent unless you also took a cutting from the rootstock, grew that on, then grafted the rose cutting onto the cloned rootstock; only then would it actually be a clone.

What varies is the degree of difficulty with vegetative propagation - plants without vascular cambium are harder to propagate, but each variety of plant may need different methods to get success, so if you want to propagate something, it's best to check out the particular plant and its recommended propagation beforehand. More reading on vegetative propagation generally here https://en.m.wikipedia.org/wiki/Vegetative_reproduction

Bamboo
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    Made me curious. Looks like *Welwitschia mirabilis* has fallen to this vegetative propagation: http://www.bihrmann.com/Travel/NAM/W-Project-en.pdf Seemed to me like one of the *last* things that'd go. – Wayfaring Stranger Feb 03 '17 at 15:21
  • @WayfaringStranger I don't have enough storage on my device to look at your link, unfortunately - usual means of propagation is by seed though – Bamboo Feb 03 '17 at 17:24
  • They managed to take individual male cotyledons, tease them apart, grow in auxin and cytokinins, then further divide the growing masses. Abscisic acid treatment turns the little cell blobs into plants. This is all on page 21-22 of pdf. Yes, seeds are the usual way to go. To paraphrase: they could not get somatic embryogenesis using methods which can be used on other Gymnosperms, but they managed to multiply from cotyledons. – Wayfaring Stranger Feb 03 '17 at 18:19
  • @WayfaringStranger thanks for the precis, interesting. What a performance though, but as its getting close to endangered, probably a useful experiment. – Bamboo Feb 03 '17 at 18:32
  • Sorry; why exactly aren't plants that are propagated from cuttings, considered clones? Surely they're genetically identical to the the plant they came from? – voices Feb 05 '17 at 23:46
  • @tjt263 - I thought I explained that clearly - see the bit that mentions Sansevieria, and then rose, where I describe what you'd have to do to make a true clone of a rose, second paragraph of the answer. Clone means an exact replica, and those two examples show why the term clone might not always be appropriate. – Bamboo Feb 06 '17 at 00:46
  • I read it; I don't know that I fully understood it. It sounds like you're talking about hybridisation or something outside the scope of my question. But I'm new to all this, so I probably just misunderstood. – voices Feb 06 '17 at 01:19
  • Okay - its also explained in the wiki link, but the bit you might be confused by is the word 'chimera', which actually just means more than one type of DNA or genetic code in one living thing, Sansevieria trifasciatia (or mother in law's tongue) being an example, so when you propagate from it, what you get won't be a clone, because it won't have the DNA that gives it the yellow patches just by taking a leaf cutting and growing it on. Most plants which are vegetatively propagated will,, indeed, be clones, but there are exceptions like Sansevieria. Hybridisation is a whole other subject... – Bamboo Feb 06 '17 at 01:59
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With effort, any plant can be cloned (i.e. propagated vegetatively), but some species do it more readily and more naturally than others. Not all can be propagated this way "naturally".

The plants that are easiest to propagate vegetatively are those that root readily from a shoot, and those that spread by rhizomes or dividing bulbs, or that naturally propagate vegetatively such as by aboveground bulblets, aboveground stems that root, or other means. In this case, you can just take the new plant generated.

Some plants do not tend to propagate vegetatively on their own, but can be induced to do so without much trouble, such as by taking a stem cutting, or layering them (burying a stem under soil until it grows roots.)

An even broader range of plants will not root if layered or if cuttings are taken, but can be induced to do so by the application of the right type of rooting hormone. By this method, the rooting of most trees and shrubs is possible, as well as many herbaceous plants.

The best methods for propagating a particular plant can vary a lot by the species, sometimes even for closely-related species. In general though, certain restrictions and commonalities in method tend to apply to broad groupings. If you want to propagate a particular plant, it is best to research methods for the specific species.

cazort
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