Drought responses of profile plant-available water and fine-root distributions in apple (Malus pumila Mill.) orchards in a loessial, semi-arid, hilly area of China.

07:00 EST 5th March 2020 | BioPortfolio

Summary of "Drought responses of profile plant-available water and fine-root distributions in apple (Malus pumila Mill.) orchards in a loessial, semi-arid, hilly area of China."

The number of apple (Malus pumila Mill.) orchards has increased substantially in hilly regions of the Loess Plateau of China, as a significant element of the large-scale 'Grain for Green' ecological rehabilitation program that aims to conserve soil and water while improving the regions economic prospects. However, the long-term effects of the orchard expansion and the adaptive responses of apple trees to drought are not known. Thus, using a space-for-time substitution approach, we investigated plant-available water and fine-root distribution in the 0-8 m soil profile in apple orchards of various ages in a dry year (2015, 392 mm rainfall) and the following year with normal precipitation (2016, 500 mm rainfall). We found that plant-available water gradually decreased with stand age in the dry year, but increased in the normal year, especially in the 0-2 m soil layer. Fine root (<2 mm diameter) distribution and biomass increased with stand age and decreased with increasing soil depth in all treatment plots, predominantly in the 0-2 m layer. In all treatment plots, most of the soil layers in the deep soil (>2 m) had soil moisture storage deficit. In the dry year (2015), the apple trees increased both the average depth (D and D values) and biomass of their fine-root systems in response to water stress, relative to the normal year (2016). Thus, the apple trees extracted water primarily from the shallow (<2 m) layers in the normal year, but from deeper soil layers in the dry year, to sustain growth. The results of this study will help to guide land and agricultural water management in rainfed apple orchards in hilly regions of the Loess Plateau and similar dryland regions.


Journal Details

This article was published in the following journal.

Name: The Science of the total environment
ISSN: 1879-1026
Pages: 137739


DeepDyve research library

PubMed Articles [19159 Associated PubMed Articles listed on BioPortfolio]

Differences in grapevine rootstock sensitivity and recovery from drought are linked to fine root cortical lacunae and root tip function.

Structural changes during severe drought stress greatly modify the hydraulic properties of fine roots. Yet, the physiological basis behind the restoration of fine root water uptake capacity during wat...

Radial water transport in arbuscular mycorrhizal maize plants under drought stress conditions is affected by indole-acetic acid (IAA) application.

Drought stress is one of the most devastating abiotic stresses, compromising crop growth, reproductive success and yield. The arbuscular mycorrhizal (AM) symbiosis has been demonstrated to be benefici...

Local root ABA/cytokinin status and aquaporins regulate poplar responses to mild drought stress independently of the ectomycorrhizal fungus Laccaria bicolor.

The better performance of mycorrhizal plants subjected to drought stress has been commonly linked to the improvement of root water uptake through the fungal regulation of plant aquaporins and hormones...

Physiological responses and aquaporin expression upon drought and osmotic stress in a conservative vs prodigal Fragaria x ananassa cultivar.

In order to improve the understanding of plant water relations under drought stress, the water use behavior of two Fragaria x ananassa Duch. cultivars, contrasting in their drought stress phenotype, i...

Ameliorating effects of biochar on photosynthetic efficiency and antioxidant defense of Phragmites karka under drought stress.

Biochar (BC) has been reported to improve growth and drought resistance in many plants. However, adequate information on the drought resistance mechanism mediated by BC on Phragmites karka, a bioenerg...

Clinical Trials [7411 Associated Clinical Trials listed on BioPortfolio]

Plant Stanol Esters and Preventing Asthma Symptoms

Plant stanols are known to lower low-density lipoprotein cholesterol. However, studies have suggested that these compounds also influence the immune system. Asthmatic responses are predomi...

The Effect of a Plant Sterols-Enriched Low-Fat Milk on Lipid Profile in Healthy Southern Chinese (COME-PASS)

This is a randomized, double-blind, single-center, two-arm, placebo-controlled clinical trial that examine the effect of the consumption of a plant sterols-enriched low-fat milk. Half of t...

Effect of Omega -3 Fatty Acids Supplements and Plant Sterol Enriched Food in Dyslipidemic Adults

The incidence of chronic degenerative diseases, especially cardiovascular disease (CVD), is high world over and especially in India. High blood cholesterol and triglyceride levels are know...

Intestinal Inflammatory and Metabolic Responses to a High Fat Meal and Plant Polyphenol Blend

This study will investigate the beneficial effects of supplementation with a plant polyphenol blend rich in anthocyanins on parameters of inflammation and metabolic responses following a c...

The Influence of Dietary Plant Sterols and Plant Stanols on Cholesterol and Plant Sterol Levels in Atheromatous Plaques

This study aims to explore whether the increased supply of dietary plant sterols and plant stanols have any influence on serum levels of phytosterols and on consistency of carotid atheroma...

Medical and Biotech [MESH] Definitions

A cone-shaped structure in plants made up of a mass of meristematic cells that covers and protects the tip of a growing root. It is the putative site of gravity sensing in plant roots.

Chemicals used mainly to disinfect root canals after pulpectomy and before obturation. The major ones are camphorated monochlorophenol, EDTA, formocresol, hydrogen peroxide, metacresylacetate, and sodium hypochlorite. Root canal irrigants include also rinsing solutions of distilled water, sodium chloride, etc.

Using fine needles (finer than 22-gauge) to remove tissue or fluid specimens from the living body for examination in the pathology laboratory and for disease diagnosis.

A genus of gram-negative, rod-shaped bacteria in the family PHYLLOBACTERIACEAE. They are able to invade root-hairs of a wide range of plants, inciting the production of PLANT ROOT NODULES.

Knobbed structures formed from and attached to plant roots, especially of LEGUMES, which result from symbiotic infection by nitrogen fixing bacteria such as RHIZOBIUM or FRANKIA. Root nodules are structures related to MYCORRHIZAE formed by symbiotic associations with fungi.

Quick Search

DeepDyve research library

Relevant Topic

Mental Health
Adhd Anorexia Depression Dyslexia Mental Health Psychiatry Schizophrenia Stress Mental health, although not being as obvious as physical health, is very important, causing great unhappiness to those affected, causing add...

Searches Linking to this Article