Plant Water Relations

Lösch, R.

doi:10.1007/978-3-642-79249-6_4

Cited by 7 publications

(1 citation statement)

References 529 publications

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“…Schulte (1992) noted that the response of leaves to water stress is not determined only by stimuli that are sensed in the leaf, but also by sources in the roots. Our understanding of the whole plant response to water stress has been considerably enhanced (Turner 1986, Davies and Zhang 1991, Losch 1993, McCuUy 1995, Slovik et al 1995. However, it is not clear how leaf tuigor can be affected by the release into the dry soil of some root exudates; for example, Hartung et al (1990) concluded that some of the ABA found in the soil (ca 50 (iAf), around the rhizosphere of Anastatica hierochwitica grown in the Negev desert, was extracted by the roots.…”

Section: Reverse Flow Imentioning

confidence: 99%

Is negative turgor fallacious?

Rhizopoulou¹

1997

Physiol Plant

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Rhizopoulou, S. 1997. Is negative turgor fallacious? -Physiol. Plant 99: 505-510.In early studies, negative turgor pressure was obtained by indirect methods and was mainly related to inaccurate measurements of osmotic and/or water potential. The uncertainties in the measurements made any discussion of the underlying reasons and phenomena premature and risky, perhaps even useless. Yet, the idea of relating negative turgor to the strength of small-sized cells with thick walls, to resist collapse when subjected to water deficit, seemed attractive. Negative turgor pressures are difficult to detect in higher plants, but they are theoretically possible. Regarding their origin, a hypothesis is discussed here, that the negative turgor detected in leaves might indicate a reversal of the water flow that has occurred in roots, under conditions of severe and prolonged drought.

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