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Topic: Tuber


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  Root and Tuber Crops
The term “root and tuber crops” is a very general "catch-all" for a wide cross-section of subterranean storage organs of which there are approximately 38 root, 23 tuber, 14 rhizome, 11 corm and 10 bulb crops.
Roots and tubers comprised significant components of the diet and had the advantage for hunter-gatherer societies in that they were available over extended periods of time due to their ability to be left in situ until needed.
With the advent of agriculture, cultivated root and tuber crops became increasingly critical sources of food with the potato, cassava and sweetpotato representing the 3
www.uga.edu /rootandtubercrops/English   (625 words)

  
  Blackleg, Aerial Stem Rot, and Tuber Soft Rot of Potato, HYG-3106-95
Blackleg, aerial stem rot, and tuber soft rot are all similar diseases caused by several types of soft-rot bacteria.
Blackleg and tuber soft rot occur wherever potatoes are grown.
Potato tubers with soft rot have tissues that are very soft and watery, and have a slightly granular consistency.
ohioline.osu.edu /hyg-fact/3000/3106.html   (959 words)

  
  Tuber Harvest
The longer the tubers are in the ground curing, the more fully developed the tubers and the better the likelihood of their keeping over the winter.
If a variety's tubers are hard to keep or it makes tubers with especially thin necks and small crowns or especially small, thin tubers, then those lacking extensive experience may wish to divide the clump into sections and leave a few tubers together.
After removing the tubers from the dip, mark each division with enough information to identify the variety name and (if there are multiples of each variety) which of the plants produced the tuber.
www.dahlia.org /seasonal.guides/tubers.html   (3020 words)

  
 Highbeam Encyclopedia - Search Results for tuber   (Site not responding. Last check: )
The eyes of a potato tuber are nodes where sprouts appear, and they are arranged in the same spiral pattern...
tuber thickened portion of the underground stem of a plant.
tuber In plants, the short, swollen, sometimes edible underground stem, modified for the storage of food, as in the potato, or as a swollen root (for example, dahlia).
www.encyclopedia.com /SearchResults.aspx?Q=tuber&StartAt=1   (755 words)

  
  Fresh Market White-Skinned Potato Varieties for Commercial Production in Northeast Florida
Tuber shape is oblong to mostly oblong with an eye depth of intermediate to shallow.
Tuber shape is round to oblong to mostly oblong with an eye depth of intermediate to shallow.
Tuber shape is round to oblong to mostly round with an eye depth of intermediate to shallow.
edis.ifas.ufl.edu /CV282   (1770 words)

  
 ARS | Publication request: IMMUNOCYTOLOGICAL ANALYSIS OF POTATO TUBER PERIDERM AND CHANGES IN PECTIN AND EXTENSIN ...
Technical Abstract: The potato (Solanum tuberosum L.) periderm forms a barrier at the surface of the tuber that protects it from infection and dehydration.
The phellogen serves as a lateral meristem that undergoes periclinal divisions to produce the phellem and the phelloderm.
An immature periderm is characterized by a meristematically active phellogen whose cell walls are thin and labile to fracture, which renders the tuber susceptible to periderm excoriation.
www.ars.usda.gov /research/publications/publications.htm?SEQ_NO_115=140435   (673 words)

  
 tuber - Encyclopedia.com
The eyes of a potato tuber are nodes where sprouts appear, and they are arranged in the same spiral pattern characteristic of buds on an aerial stem.
Manipulating stem number, tuber set, and yield relationships for northern- and southern-grown potato seed lots.
Prediction of cadmium concentrations in potato tubers (Solanum tuberosum L.) by pre-plant soil and irrigation water analyses.
www.encyclopedia.com /doc/1E1-tuber.html   (431 words)

  
 Tropical Waterlily Tuber Propagation "Sean's Ponds & Patio Garden"
Once new growth begins to show itself on the tuber and there are visible roots the new plantlet can be removed from the tuber to form a new plant which in time will also form it's own tuber.
If you notice there is already new growth on the tuber at this time forming new plantlets that can be grown on for a few weeks until they are large enough to also be removed from the tuber.
By leaving one start on the tuber and potting it up and left to grow on for the rest of the season the plantlet will feed the mother propagating tuber and nurse it back to health as well as form an additional tuber on the plantlet.
members.shaw.ca /marcmitchell/tuber_division/tutorial.html   (789 words)

  
 Effect of seed tuber size on the growth and development of yam (Dioscorea alata L.)   (Site not responding. Last check: )
The effect of the seed tuber size on the growth and development of yam was investigated using two cultivars: Lisiteye introduced from Papua New Guinea and a local cultivar from Africa.
Tubers of these cultivars were cut into fragments with five sizes (20, 50, 80, 110 and 140 g).
The effects of seed tuber size of both cultivars on growth were evident from the early growth stages, with increases in stem length, in number of branches, and in total leaf area in proportion to the seed tuber weight.
www.trophort.com /information/data/B01/S49/TOY98EFF2821463.html   (289 words)

  
 Michigan Potato Diseases - Tuber Diseases
Late blight infection of tubers is characterized by irregularly shaped, slightly depressed brown to purplish areas on the skin.
Late blight rot of tubers is often accompanied by soft rot, and in many cases more than one fungal pathogen may infect tubers at the same time.
Tubers show a general darkening of the tissue and the presence of liquid exudates when compressed.
www.potatodiseases.org /tuberdiseases.html   (946 words)

  
 OVERVIEW OF ROOT AND TUBER CROPS
The consumption of root and tuber crops as food in developed countries is considerably smaller than it is in developing countries, but their use as animal feeds is relatively higher.
The lesser-known Andean root and tuber crops, of which there are more than a dozen, vary considerably in their ranges of adaptation and tolerance to environmental conditions.
When these patterns are examined regionally by commodity, it is clearly evident that the total consumption of root and tuber crops is increasing in Africa with annual rates of change for potato and cassava of +0.32%, and of yam a surprising +8.5%.
www.fao.org /Wairdocs/TAC/X5791E/x5791e0b.htm   (2853 words)

  
 Little Tuber Disorder
Upon planting little tubers are initiated directly at the eyes of the seed piece or on very short stolons while the seed piece is sprouting.
Physiologically, it is induced by a break down of apical dominance of the eyes on the tuber and of sprouts on the stolons.
This disorder is due to physiological aging of seed tubers as a response to high late-season storage temperature.
www.panhandle.unl.edu /potato/html/little_tuber_disorder.htm   (296 words)

  
 TEMPERATURE AND IRRADIANCE EFFECTS ON TUBER GROWTH OF SANDERSONIA AURANTIACA
Plants were sampled at intervals during tuber growth and at maturity to assess tuber fresh weight, tuber dimensions and the development of secondary tubers.
Tuber growth rates were significantly affected by both temperature and irradiance, responding positively to increasing irradiance at all temperatures.
Taken together with the relatively small effect of temperature on tuber growth rate prior to the onset of secondary tuber formation, this suggests that assimilate supply is not the primary factor involved in the onset of secondary tuber formation.
www.actahort.org /books/430/430_6.htm   (351 words)

  
 Digging and Storing Dahlia Tubers Page 4
In addition to trimming the head, trim all the small roots clinging to the tuber including the root that is an extension of the tuber itself.
If the tuber is extremely long, you may cut off a significant portion of the tuber--perhaps as much as one- third.
Marking each tuber is time consuming if you have many to do but it is the most reliable, because you can identify each tuber even if they get put into the wrong bag, box, or bin.
www.dahlias.net /dahwebpg/TuberStor/TuberStor4.htm   (404 words)

  
 How to Grow Begonias from Tubers.
When the tubers have sprouted and small leaves are showing, pot the tubers up to a 5 in (13 cm) pot filled with John Innes compost No. 2.
It is a good idea at this stage to place a supporting cane in the pot in order to tie the stems to it as the plant grows, because begonia's stem and foliage tend to be very brittle.
Store the tubers in a dry position preferably in dry sand in a frost-free place for the winter season to grow again next year.
www.gardenhive.com /flowers/begonias/grow/tubers   (732 words)

  
 Tropical Root and Tuber Crops
Tuber flesh varies from white to yellow and is from 15 to 40% starch.
Tubers have a distinct dormancy period, which can be extended with curing and the application of gibberellic acid.
Propagules are portions of the tuber, with larger propagules producing larger tubers at harvest.
www.hort.purdue.edu /newcrop/proceedings1990/v1-424.html   (2624 words)

  
 tuber
The potato is a stem tuber, as shown by the presence of terminal and lateral buds, the ‘eyes’ of the potato.
Both types of tuber can give rise to new individuals and so provide a means of vegetative reproduction.
Unlike a bulb, a tuber persists for one season only; new tubers developing on a plant in the following year are formed in different places.
www.tiscali.co.uk /reference/encyclopaedia/hutchinson/m0007019.html   (268 words)

  
 Australasian Native Orchid Society (ANOS Victoria, Australia) - Tuber Bank
The Tuber Bank operates to give terrestrial orchid growers a means of passing on excess orchid tubers to other society members.
The Tuber Bank operates in January each year as this is the time that most terrestrial orchid species are dormant.
Orchid tubers donated to the tuber bank should be positively identified (with provenance details if available), in good condition, clean, disease and virus free.
www.anosvic.org.au /ANOS_Vic_Tuber_Bank.html   (499 words)

  
 tuber - Research the news about tuber - from HighBeam Research
Root tubers produce no buds, or produce buds only at the point where the tuber is attached to the stem of the plant.
Stem tubers (in potatoes, for example) often produce buds along the stem from which aerial stems arise the following season.
Root tubers produce no buds, or produce buds only at the point where the tuber is attached to the stem of the...
www.highbeam.com /search.aspx?q=tuber&ref_id=ency_botnm   (1137 words)

  
 Growing Tropical Waterlilies From Tuber   (Site not responding. Last check: )
As long as the plants are attached to the tubers they don't seem to "cook" but will deteriorate rapidly when separated from the tubers and left in the bags.
Tubers are buried in the gravel and produce new plants, their size limited by a total lack of nutrients.
If these plants are removed from their tubers and left in the gravel, they often will make new tubers as the weather cools.
www.victoria-adventure.org /waterlilies/tropicals_from_tuber.html   (991 words)

  
 Agriculture, Fisheries and Aquaculture: Potato Tuber Yields and Root Lesion Nematodes
After hatching from the egg, all four life stages, from the second-stage juvenile to the adult male or female, are capable of feeding on plant roots.
Field studies have indicated that tuber yield can be reduced by as much as 40%, depending on the numbers of nematodes present in the soil at planting.
On Prince Edward Island, Pratylenchus penetrans populations greater than 2000 per kg of soil at planting usually cause tuber yield reductions in the cultivar ‘Superior.’ ‘Russet Burbank’ and ‘Shepody’ are not as susceptible to nematode damage, but counts greater than 5000 nematodes per kg of soil at planting may cause significant yield reductions.
www.gov.pe.ca /af/agweb/index.php3?number=71620&lang=f   (535 words)

  
 Tuber, Tuber II and Tuber 2b - Tube Finned Multi-Stage Rockets
Over time, Tuber's nose cone got dinged up some, and there were plently of cracks in the paint, but she proved to be quite rugged, and always entertained me.
Featuring three stages, the Tuber II has 24mm motor tubes which allows the use of higher thrust motors to get her off the launch pad with a little more authority.
Weight-wise, the Tuber II's upper stage was a little lighter, promising to be flyable on a B6-0/B4-4 combo for small field and demo flights.
home.flash.net /~samily/tuber   (609 words)

  
 Potato - Tuber   (Site not responding. Last check: )
The part of the potato plant we eat is called the tuber, which is actually an enlarged underground stem.
Potato tubers come in a variety of colors, but most common are red and white.
An identifying feature of potato tubers is their "eyes," which are small nodes with buds.
www.hort.purdue.edu /ext/senior/vegetabl/potato1.htm   (85 words)

  
 The Sucrose Transporter StSUT1 Localizes to Sieve Elements in Potato Tuber Phloem and Influences Tuber Physiology and ...
D, Transmission micrograph of the same sink tuber cross-section as shown in C. Arrow, Sieve plates are visible in the sieve elements of the phloem.
Tuber yield is given as percentage of the corresponding wild-type yield (100%) at the time of tuber harvest.
Tuber stages are the same as in Table II.
www.plantphysiol.org /cgi/content/full/131/1/102   (6529 words)

  
 ASBP Research Projects: Potato Tuber Moth
Potato tuber moth causes damage to growing plants by mining leaves in the field, and infesting potato tubers held in storage, allowing for bacterial infection, which makes them unfit for consumption or use as seed.
A laboratory study was carried out at CIP to study the larval development of two potato tuber moth species, Phthorimaea operculella, and Symmetrischema tangolias, which are important pests of potato throughout the Andean region, on the transgenic material from MSU.
Future work will test mortality of these insects on transgenic tubers, and discussions are currently taking place with CIP to assess the possibility of testing the material in the field.
www.iia.msu.edu /absp/potato_00.html   (1158 words)

  
 Verbena Rigida - Tuber Vervain
The Tuber Vervain is a perennial wildflower originating from Brazil, Argentina, Paraguay, and Chile.
The Tuber Vervain typically grows best in full sun and grows well in any soil which explains why it is often seen in the wild.
The lavender flowers of the Tuber Vervain are often 1/4 inch in size.
www.ics.uci.edu /~jerenkra/bio-h90   (307 words)

  
 APPENDIX 5 - AIDE-MEMOIRE - OVERVIEW OF RESEARCH ON ROOT AND TUBER CROPS CONDUCTED OUTSIDE THE AMBIT OF THE CGIAR
However, it is also widely evident and recognized in the scientific literature that the root and tuber crop research 'campus' embraces a broad range of national research institutes across the developing world, working in collaboration with (via networks) or independently of the CGIAR centres.
CARDI attaches high priority to root and tuber crop research, largely because of the resistance of these crops to withstand tropical storms and hurricane damage in the Carribbean regions.
That is, that the centres might be requested to formally develop global data bases of all on-going research on roots and tubers and to periodically synthesise this information in terms of "state of the art" review papers in each of the relevant fields of research.
www.fao.org /Wairdocs/TAC/X5791E/x5791e0r.htm   (2208 words)

  
 ARS | Publication request: PHOSPHORUS SUPPLY ALTERS TUBER COMPOSITION, FLOWER PRODUCTION, AND MYCORRHIZAL ...
Tubers of two hybrid calla lily (calla) cultivars (Zantedeschia `Pot of Gold¿ [PG], `Majestic Red¿ [MR]) were inoculated with AMF and grown at three different rates of phosphorus (P) supply to assess how inoculation alters aspects important to successful commercial production of this geophyte including, plant development, vegetative reproduction, flower production, and tuber quality.
Tubers and flowers of calla responded differently to AMF inoculation.
Differences in mycorrhizal responsiveness between cultivars were related to differences in P requirements for flower and tuber production and the influence of P supply on resource allocation to different reproductive strategies.
www.ars.usda.gov /research/publications/publications.htm?seq_no_115=187167&pf=1   (493 words)

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