Publications by authors named "Pierre Delaplace"

The potential of seed endophytic microbes to enhance plant growth and resilience is well recognized, yet their role in alleviating cold stress in rice remains underexplored due to the complexity of these microbial communities. In this study, we investigated the diversity of seed endophytic microbes in two rice varieties, the cold-sensitive CB9 and the cold-tolerant JG117. Our results revealed significant differences in the abundance of Microbacteriaceae, with JG117 exhibiting a higher abundance under both cold stress and room temperature conditions compared to CB9.

View Article and Find Full Text PDF
Article Synopsis
  • Branching and tillering in wheat are crucial for plant structure and yield but are influenced by various internal and external factors; understanding these processes is limited.
  • This research discovered a new regulator of wheat tillering using a refined method called uni-BSA, which minimizes genetic noise, and identified a gene linked to reduced tillers due to issues in bud growth.
  • The study demonstrates how this gene impacts sucrose levels in plants, crucial for bud development, and presents the uni-BSA method as a valuable tool for identifying significant agronomic genes, aiding in crop improvement efforts.
View Article and Find Full Text PDF
Article Synopsis
  • Axillary meristems (AMs) play a crucial role in determining the number of shoots or tillers in plants, affecting their overall structure and crop yields.
  • The review focuses on the genetic and hormonal factors involved in AM initiation, mainly using research from Arabidopsis and rice as examples.
  • It highlights key genes like LATERAL SUPPRESSOR (LAS) and discusses the relationship between AM and shoot apical meristem (SAM), while also considering the potential of new research methods to enhance crop productivity.
View Article and Find Full Text PDF

Biosolids are considered an alternative to chemical fertilizers due to their rich nutrients. However, long-term biosolids application can lead to heavy metals accumulation, which severely affects soil microbial community compositions. The factors influencing soil microbial community assembly were explored under a 16-year long-term experiment with biosolids applications.

View Article and Find Full Text PDF

Rice, which feeds more than half of the world's population, confronts significant challenges due to environmental and climatic changes. Abiotic stressors such as extreme temperatures, drought, heavy metals, organic pollutants, and salinity disrupt its cellular balance, impair photosynthetic efficiency, and degrade grain quality. Beneficial microorganisms from rice and soil microbiomes have emerged as crucial in enhancing rice's tolerance to these stresses.

View Article and Find Full Text PDF

Shoot branching is a complex and tightly regulated developmental process that is essential for determining plant architecture and crop yields. The outgrowth of tiller buds is a crucial step in shoot branching, and it is influenced by a variety of internal and external cues. This review provides an extensive overview of the genetic, plant hormonal, and environmental factors that regulate shoot branching in several plant species, including rice, Arabidopsis, tomato, and wheat.

View Article and Find Full Text PDF

Drought severely affects the yield of wheat (Triticum aestivum L.), which is mainly grown in arid and semi-arid regions. Melatonin plays an important role in various types of stress resistance in plants, including drought resistance.

View Article and Find Full Text PDF

Coupling phosphate-solubilizing bacteria (PSB) with P fertilizers, including polyphosphates (PolyP), was reported as eco-efficient approach to enhance P use efficiency. Although PSB have been recently reported to hydrolyze PolyP, the plant growth promoting mechanisms of PolyP-PSB co-application were not yet uncovered. This study aims to evaluate the effect of a PSB consortium (PSB) on growth, P use efficiency (PUE), and wheat yield parameters under PolyP (PolyB) application.

View Article and Find Full Text PDF

Introduction: Peanut ( L.) is a widespread oilseed crop of high agricultural importance in tropical and subtropical areas. It plays a major role in the food supply in the Democratic Republic of Congo (DRC).

View Article and Find Full Text PDF
Article Synopsis
  • * A new hydroponic setup combined with a specific bioassay was developed to test and analyze the BNI activity of root exudates from different wheat genotypes, allowing for simultaneous processing of many samples.
  • * The study found that wheat showed stronger BNI activity during its early growth phase, and while temperature didn't significantly affect BNI, osmotic stress influenced the trait differently depending on the specific genotype.
View Article and Find Full Text PDF
Article Synopsis
  • - The study investigates how different types of polyphosphate (PolyPs) fertilizers affect the growth and nutrient uptake of durum wheat, particularly the effects on root and shoot traits associated with phosphorus acquisition.
  • - Three PolyPs (PolyA, PolyB, PolyC) were tested against a conventional fertilizer (OrthoP) at three different application rates (30, 60, and 90 kg P/ha), with the 60 kg rate showing the most significant benefits for root and shoot performance.
  • - Results indicated that PolyB and PolyC notably improved root growth and efficiency in phosphorus absorption, which correlated with better overall plant health and nutrient acquisition, especially enhancing photosynthesis and nutrient uptake in wheat at the 60 kg
View Article and Find Full Text PDF
Article Synopsis
  • * This study evaluated four PSB species and their consortium, finding that they significantly increased phosphorus release from two types of polyphosphate fertilizers, with a strong link to acid production and phosphatase enzyme activity.
  • * Co-applying PSB with polyphosphate fertilizers enhanced wheat growth metrics, including root development and phosphorus acquisition, with the PSB consortium yielding the best results compared to controls.
View Article and Find Full Text PDF

Background: Mineral phosphorus (P) fertilizers must be used wisely in order to preserve rock phosphate, a limited and non-renewable resource. The use of bio-inoculants to improve soil nutrient availability and trigger an efficient plant response to nutrient deficiency is one potential strategy in the attempt to decrease P inputs in agriculture.

Method: An in vitro co-cultivation system was used to study the response of to contrasted P supplies (soluble and poorly soluble forms of P) and inoculation with P solubilizing bacteria.

View Article and Find Full Text PDF

The extensive use of chemical pesticides leads to risks for both the environment and human health due to the toxicity and poor biodegradability that they may present. Farmers therefore need alternative agricultural practices including the use of natural molecules to achieve more sustainable production methods to meet consumer and societal expectations. Numerous studies have reported the potential of essential oils as biopesticides for integrated weed or pest management.

View Article and Find Full Text PDF

Humic-like substances (HLSs) isolated by alkaline oxidative hydrolysis from lignin-rich agro-industrial residues have been shown to exert biostimulant activity toward maize ( L.) germination and early growth. The definition of a quantitative structure-activity relationship (QSAR) between HLS and their bioactivity could be useful to predict their biological properties and tailor plant biostimulants for specific agronomic and industrial uses.

View Article and Find Full Text PDF

Plants, under stressful conditions, can proceed to photosynthetic adjustments in order to acclimatize and alleviate the detrimental impacts on the photosynthetic apparatus. However, it is currently unclear how adjustment of photosynthetic processes under environmental constraints by plants influences CO gas exchange at the ecosystem-scale. Over a 2-year period, photosynthetic performance of a temperate grassland ecosystem was characterized by conducting frequent chlorophyll fluorescence (ChlF) measurements on three primary grassland species ( L.

View Article and Find Full Text PDF

Several experiments have highlighted the complexity of stress interactions involved in plant response. The impact in field conditions of combined environmental constraints on the mechanisms involved in plant photosynthetic response, however, remains understudied. In a long-term field study performed in a managed grassland, we investigated the photosynthetic apparatus response of the perennial ryegrass (Lolium perenne L.

View Article and Find Full Text PDF

In the context of chemical ecology, the analysis of the temporal production pattern of volatile organic compounds (VOCs) in root tissues and the emission rate measurement of root-emitted VOCs are of major importance for setting up experiments to study the implication of these compounds in biotic interactions. Such analyses, however, remain challenging because of the belowground location of plant root systems. In this context, this study describes the evolution of the root VOC production pattern of barley (Hordeum distichon L.

View Article and Find Full Text PDF

Background: Plant growth-promoting rhizobacteria are increasingly being seen as a way of complementing conventional inputs in agricultural systems. The effects on their host plants are diverse and include volatile-mediated growth enhancement. This study sought to assess the effects of bacterial volatiles on the biomass production and root system architecture of the model grass Brachypodium distachyon (L.

View Article and Find Full Text PDF

The effect of combined abiotic and biotic factors on plant volatile organic compound (VOC) emissions is poorly understood. This study evaluated the VOC emissions produced by Arabidopsis thaliana (L.) Col-0 subjected to 3 temperature regimes (17, 22, and 27°C) in the presence and absence of Plutella xylostella larvae over 2 time intervals (0-4 and 4-8 h), in comparison to control plants.

View Article and Find Full Text PDF

Yeast Pichia anomala strain Kh6 Kurtzman (Saccharomycetales: Endomycetaceae) exhibits biological control properties that provide an alternative to the chemical fungicides currently used by fruit or vegetable producers against main post-harvest pathogens, such as Botrytis cinerea (Helotiales: Sclerotiniaceae). Using an in situ model that takes into account interactions between organisms and a proteomic approach, we aimed to identify P. anomala metabolic pathways influenced by the presence of B.

View Article and Find Full Text PDF

Nitrogen fertilization increases crop yield but excessive nitrate use can be a major environmental problem due to soil leaching or greenhouse gas emission. Root traits have been seldom considered as selection criteria to improve Nitrogen Use Efficiency of crops, due to the difficulty of measuring root traits under field conditions. Nonetheless, learning about mechanisms of lateral root (LR) growth stimulation or repression by nitrate availability could help to redesign root system architecture (RSA), a strategy aimed at developing plants with a dense and profound root system and with higher N uptake efficiency.

View Article and Find Full Text PDF

During post-harvest storage, potato tubers age as they undergo an evolution of their physiological state influencing their sprouting pattern. In the present study, physiological and biochemical approaches were combined to provide new insights on potato (Solanum tuberosum L. cv.

View Article and Find Full Text PDF

The impact of processing on nonenzymatic antioxidant degradation and lipid oxidation leading to off-flavor development in potato flakes during storage was investigated. Lipoxygenase activity measurements in parallel with the analysis of lipid oxidation products (oxylipins) profiles using HPLC showed that the processing conditions used inhibited efficiently enzymatic lipid oxidation. However, nonenzymatic lipid oxidation products were found throughout processing and in fresh potato flakes.

View Article and Find Full Text PDF

Potato tubers (cv. Bintje) (Solanum tuberosum L.) were stored under extreme conditions at 20 degrees C for 350 days without sprout inhibitors in order to assess whether aging- and/or senescence-related processes occurred.

View Article and Find Full Text PDF

A PHP Error was encountered

Severity: Warning

Message: fopen(/var/lib/php/sessions/ci_sessionvnsdjpgj27d1g2bsmpsmpi974kiblakk): Failed to open stream: No space left on device

Filename: drivers/Session_files_driver.php

Line Number: 177

Backtrace:

File: /var/www/html/index.php
Line: 316
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: session_start(): Failed to read session data: user (path: /var/lib/php/sessions)

Filename: Session/Session.php

Line Number: 137

Backtrace:

File: /var/www/html/index.php
Line: 316
Function: require_once