English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Seedlings of maritime pine (Pinus pinaster Ait.) were grown in hydroponics and submitted either to a potassium deficiency or to an all-macronutrient deficiency. In response to both nutrient stresses, tap root elongation was maintained while lateral root elongation was severely reduced. In both treatments, K content was decreased to 0.85 % of dry weight in roots and in shoots. Other minerals were little affected by the single deficiency except nitrogen, whose content increased significantly in roots. Measurements of the concentrations of inorganic ions, sol- uble sugars and amino acids on a tissue water basis revealed that, in unstressed plants, potassium, phosphate, choride, glucose, fructose and glutamine accounted for about two thirds of cell osmotic pressure with relative contributions depending on location in the root system. In seedlings subjected to deficiency, K was more or less efficiently replaced by soluble sugars, glutamine and/or sodium according to location in the root system. Osmotic pressure was better maintained in younger tissues but also in tap root tip as compared to lateral root tip.

annales des sciences forestières

Contribution of different solutes to the cell osmotic pressure in tap and lateral roots of maritime pine seedlings: effects of a potassium deficiency and of an all-macronutrient deficiency