Shrub understorey clearing and drought affects water status and growth of juvenile Quercus suber trees

To arrive at a good status of all European water bodies is the main objective of the European Union (EU) Water Framework Directive (WFD). Since its adoption in 2000, the policy has fundamentally changed the institutional, procedural and organizational structures of Member States' water management, leading to an Europeanization of national legislation and decision-making structures. The case of WFD implementation in Schleswig-Holstein is an example of the policy's highly innovative governance architecture that unfortunately is not (yet) able to take that one last hurdle: to improve water quality and establish a good water status across EU Member States by 2015 or 2027.

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"Ecophysiological Diversity of the afares oak (Quercus afares) compared to the cork oak (Quercus suber) and the zeen oak (Quercus canariensis) in Kroumirie (Aïn Zana: Tunisia) "

Journal of Environmental Science Computer Science and Engineering & Technology ◽

10.24214/jecet.a.9.3.48194 ◽

2020 ◽

Vol 9 (3) ◽

Keyword(s):

Quercus Suber ◽

Cork Oak ◽

Quercus Canariensis

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The Method of Plant Water Status Measurement in Sweet Potato (Ipomoea Batatas (L) Lam.)

Beccariana Botanical Research Bulletin ◽

10.30862/bbrp.v7i1.274 ◽

2010 ◽

Vol 7 (1) ◽

Author(s):

Saraswati Prabawardani

Keyword(s):

Water Content ◽

Sweet Potato ◽

Relative Water Content ◽

Water Status ◽

Plant Water Status ◽

Equilibration Time ◽

Plant Water ◽

Font Size ◽

Potato Leaf ◽

Relative Water

The measurement of plant water status such as leaf water potential (LWP) and leaf relative water content (RWC) is important part of understanding plant physiology and biomass production. Preliminary study was made to determine the optimum amount of leaf abrasion and equilibration time of sweet potato leaf inside the thermocouple psychrometer chambers. Based on the trial, the standard equilibration time curve of a Peltier thermocouple for sweet potato leaf was between 2 and 3 hours. To increase the water vapour conductance across the leaf epidermis the waxy leaf cuticle should be removed or broken by abrasion. The result showed that 4 times leaf rubbings was accepted as the most effective way to increase leaf vapour conductance of sweet potato in the psychrometer chambers. In calculating the leaf relative water content, unstressed water of sweet potato leaves require 4 hours imbibition, whereas water stressed of sweet potato leaves require 5 to 6 hours to reach the saturation time. Either leaf water potential or relative water content can be used as a parameter for plant water status in sweet potato.

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