unsheathed roots

Spanish translation: raíces sin vaina de suelo, raíces sin rizocoraza

GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)

English term or phrase:	unsheathed roots
Spanish translation:	raíces sin vaina de suelo, raíces sin rizocoraza
Entered by:	Kepa S S O (X)

22:09 Oct 2, 2015

English to Spanish translations [PRO]
Science - Botany / biochemistry

English term or phrase: unsheathed roots

Saludos
Para la traducción apropiada.
De antemano gracias.

Our suggestion of a bimodal distribution of rhizosphere hydraulic properties is partly an analogy to the observations of McCully and co-workers (Vermeer and McCully, 1982; Wang et al., 1991; Watt et al., 1994), who observed bimorphic behaviour for grass roots, in particular corn roots. They distinguished between sheathed roots and bare roots. The formation of sheaths around roots (rhizosheaths) is closely linked to the presence of mucilage, and sheathed roots are reported to show higher water content compared with bare roots. As roots develop, rhizosheath develops around young roots about 2 cm behind the tips, and sheath is lost as root age increases. Loss of soil sheath coincides with the maturation of late metaxylem vessels (Wang et al., 1991).

Soil sheaths incorporating aggregated soil particles surround young roots of many species, but the effects of such sheaths on water movement between roots and the soil are largely unknown. The quantity and location of root exudates associated with soil sheath along the entire length of its young roots, except within 1.4 cm of the tip. The soil sheaths, which average 0.7 mm in thickness, were composed of soil particles and root hairs, both of which were covered with exuded mucilaginous material. As determined with a [sup 14]C pulse-labeling technique, 2% of newly fixed [sup 14]C-photosynthate was translocated into the roots at 3d, 6% at 9 d, and 8% at 15 d after labeling. The fraction of insoluble [sup 14]C in the roots increased twofold from 3 d to 15 d. Over the same time period, 6%-9% of the [sup 14]C translocated to the roots was exuded into the soil. The soluble [sup 14]C compounds exuded into the soil were greater in the 3-cm segment at the root tip than elsewhere along the root, whereas mucilage was exuded relatively uniformly along roots 15 cm in length. The volumetric efflux of water increase for both sheathed and unsheathed roots as the soil water potential decreased form -0.1 MPa to -1.0 MPa. The efflux rate was greater for unsheathed roots than for sheathed roots, which were more turgid and had a higher water potential, especially at lower soil water potentials. During drying, soil particles in the sheaths aggregate more tightly, making the sheaths less permeable to water and possibly creating air gaps. The soil sheaths of O. ficus-indica thus reduce water loss from the roots to a drying soil.

Kepa S S O (X) KudoZ activity Questions: 202 (none open) Answers: 95 Colombia
Local time: 00:16

raíces sin vaina

Explanation:
http://es.slideshare.net/Genesismilena/interaccion-de-microo...

Selected response from:

Mónica Algazi
Uruguay
Local time: 02:16

Grading comment

Thank you very much.
4 KudoZ points were awarded for this answer

Summary of answers provided

3 +1

raíces sin vaina

Mónica Algazi

raíces sin tegumento

Juan Arturo Blackmore Zerón

raíces desenvainandas

Neil Ashby

Raíces recubiertas y no recubiertas

Mauricio Roa

Answers

1 hr confidence:

peer agreement (net): +1

raíces sin vaina

Explanation:
http://es.slideshare.net/Genesismilena/interaccion-de-microo...

Mónica Algazi
Uruguay
Local time: 02:16
Native speaker of:

Spanish
PRO pts in category: 34

Grading comment

Thank you very much.

2 hrs confidence:

raíces sin tegumento

Explanation:
Mi propuesta.

Juan Arturo Blackmore Zerón
Mexico
Local time: 00:16
Native speaker of: Spanish
PRO pts in category: 12

11 hrs confidence:

raíces desenvainandas

Explanation:
My suggestion. ;')

Neil Ashby
Spain
Local time: 07:16
Works in field
Native speaker of: English
PRO pts in category: 4

2 days 22 hrs confidence:

sheathed and unsheathed roots Raíces recubiertas y no recubiertas

Explanation:
Por el contexto se refiere a un tipo de recubrimiento de las raíces que las protege de los factores ambientales.

Reference: http://www.slideshare.net/janebernadettes/plant-organs-syste...

Mauricio Roa
Colombia
Local time: 00:16
Native speaker of:

Spanish

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unsheathed roots

Spanish translation: raíces sin vaina de suelo, raíces sin rizocoraza

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unsheathed roots

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