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United States Department of Agriculture (USDA) 2014

FRUIT AND NUT TREES IN A DYNAMIC ENVIRONMENT – QUANTIFYING SPECIES RESISTANCE TO ABIOTIC STRESSES (FREEZING, SALINITY AND DROUGHT) AND THEIR COMBINATIONS

Fruit Nut Tree Abiotic Stress

United States Department of Agriculture (USDA) Research, Education & Economics Information System (REEIS)

Titre : FRUIT AND NUT TREES IN A DYNAMIC ENVIRONMENT – QUANTIFYING SPECIES RESISTANCE TO ABIOTIC STRESSES (FREEZING, SALINITY AND DROUGHT) AND THEIR COMBINATIONS

Identification : CA-D-PLS-2224-H

Pays : Etats Unis

Durée : Feb 18, 2014 à Sep 30, 2018

Mots clés : drought ; salinity ; freezing ; abiotic stress ; fruit and nut trees ; tree biology ; tree hydraulics

Partenaire : UNIVERSITY OF CALIFORNIA, DAVIS 410 MRAK HALL DAVIS,CA 95616-8671

Objectifs
The goal of the proposed research is to build a fundamental knowledge base for understanding the biological responses of fruit and nut crop trees to drought, salinity and freezing stresses and their interactive effects on plant survival, vitality and yield. While my general goal is to establish a long-term tree research program at UC Davis, I expect this to happen in smaller steps in collaboration with researchers and specialists across the UC system and Commodity Research Boards. This proposal serves as the first step and is focused on learning the principles of tree resistance to major abiotic stresses—namely, freezing, salinity and drought. The specific objectives of this proposal are : Establish biological/physiological responses of fruit and nut trees (both rootstocks and scions) to variable temperature (freezing), salinity and drought as well as combinations of these abiotic stresses. Proposed areas of research include : Study of plant hydraulics in the context of a changing climate Role of carbohydrates in mitigation of drought, salinity and freezing stresses Role of parenchyma tissue in salt tolerance Study transcription level responses of selected species to abiotic stresses to determine shared signaling/metabolic pathways triggered by a diverse range of abiotic stresses that could be targeted in future breeding programs. We would like to : Compare whole transcriptome response of selected species to stress Determine metabolic pathways that are perturbed by environmental stress and variations in the transcription of associated genes Determine species tolerance limits to environmental perturbations as well as temporal dynamics of exposure to stresses that may cause scion/rootstock death or permanent damage and reduced yield, including : Greenhouse/lab studies in controlled environments - freezing, salt, and drought. Field experiments in commercial orchards under current management practices Provide biological bases for mitigation of adverse environmental conditions via management practices including : Water irrigation regimes for drought stress mitigation under saline conditions Biology of salt stress mitigation Control of freezing damage Provide biological bases for physiological/morphological traits that may be used by breeding programs aiming to improve tree tolerance to freezing, salinity and drought

Présentation : USDA

Page publiée le 23 octobre 2015, mise à jour le 24 novembre 2017