scholarly journals Nondestructive Detection of Water Stress in Tomato Plants Using Microwave Sensing (2)

2004 ◽  
Vol 42 (1) ◽  
pp. 83-90
Author(s):  
Takashi SHIMOMACHI ◽  
Takehiro TAKEMASA ◽  
Kenji KURATA ◽  
Tadashi TAKAKURA
Keyword(s):  
Water Stress ◽  
Nondestructive Detection ◽  
Tomato Plants

scholarly journals Nondestructive Detection of Water Stress in Tomato Plants by Microwave Sensing.

2001 ◽  
Vol 39 (1) ◽  
pp. 17-25
Author(s):  
Takashi SHIMOMACHI ◽  
Nancy K. OKAMURA ◽  
Takehiro TAKEMASA ◽  
Tadashi TAKAKURA
Keyword(s):  
Water Stress ◽  
Nondestructive Detection ◽  
Tomato Plants

Nondestructive Detection of Water Stress in Tomato Plants by NIR Spectroscopy.

2001 ◽  
Vol 39 (2) ◽  
pp. 75-85 ◽  
Author(s):  
Nancy K. OKAMURA ◽  
Takashi SHIMOMACHI ◽  
Takehiro TAKEMASA ◽  
Tadashi TAKAKURA
Keyword(s):  
Water Stress ◽  
Nir Spectroscopy ◽  
Nondestructive Detection ◽  
Tomato Plants

scholarly journals Transcriptional and Physiological Analyses to Assess the Effects of a Novel Biostimulant in Tomato

2022 ◽  
Vol 12 ◽  
Author(s):  
Maria Cristina Della Lucia ◽  
Ali Baghdadi ◽  
Francesca Mangione ◽  
Matteo Borella ◽  
Walter Zegada-Lizarazu ◽  
...  
Keyword(s):  
Water Stress ◽  
Expression Profiles ◽  
Expression Patterns ◽  
Gene Expression Profiles ◽  
Principal Component ◽  
Negative Effects ◽  
Nutrient Metabolism ◽  
Tomato Plants ◽  
Reverse Transcription Pcr ◽  
Osmotic Stress Tolerance

This work aimed to study the effects in tomato (Solanum lycopersicum L.) of foliar applications of a novel calcium-based biostimulant (SOB01) using an omics approach involving transcriptomics and physiological profiling. A calcium-chloride fertilizer (SOB02) was used as a product reference standard. Plants were grown under well-watered (WW) and water stress (WS) conditions in a growth chamber. We firstly compared the transcriptome profile of treated and untreated tomato plants using the software RStudio. Totally, 968 and 1,657 differentially expressed genes (DEGs) (adj-p-value < 0.1 and |log2(fold change)| ≥ 1) were identified after SOB01 and SOB02 leaf treatments, respectively. Expression patterns of 9 DEGs involved in nutrient metabolism and osmotic stress tolerance were validated by real-time quantitative reverse transcription PCR (RT-qPCR) analysis. Principal component analysis (PCA) on RT-qPCR results highlighted that the gene expression profiles after SOB01 treatment in different water regimes were clustering together, suggesting that the expression pattern of the analyzed genes in well water and water stress plants was similar in the presence of SOB01 treatment. Physiological analyses demonstrated that the biostimulant application increased the photosynthetic rate and the chlorophyll content under water deficiency compared to the standard fertilizer and led to a higher yield in terms of fruit dry matter and a reduction in the number of cracked fruits. In conclusion, transcriptome and physiological profiling provided comprehensive information on the biostimulant effects highlighting that SOB01 applications improved the ability of the tomato plants to mitigate the negative effects of water stress.

scholarly journals Effect of abscisic acid on the calcium content for controlling blossom-end rot in tomato under water stress

2018 ◽  
Vol 48 (4) ◽  
pp. 414-419
Author(s):  
Carlos Agostinho Balate ◽  
Douglas Correa de Souza ◽  
Luciane Vilela Resende ◽  
Sergio Tonetto de Freitas
Keyword(s):  
Abscisic Acid ◽  
Water Stress ◽  
Calcium Uptake ◽  
Foliar Application ◽  
Calcium Content ◽  
Distal Region ◽  
Tomato Plants ◽  
Blossom End Rot ◽  
Beginning Of Flowering ◽  
Irrigation Levels

ABSTRACT Water stress in tomato plants may cause the incidence of blossom-end rot. This study aimed to analyze the effect of abscisic acid leaf application for increasing the calcium uptake in irrigated tomato (‘Santa Clara' cultivar) in the field, as a possible mechanism of blossom-end rot inhibition. The treatments consisted of four irrigation levels (25 %, 50 %, 75 % and 100 % of the crop water requirements to fulfil the crop evapotranspiration) and two abscisic acid doses (0 mg L-1 and 500 mg L-1). The fruits were harvested at 15 and 30 days after the anthesis and evaluated for calcium content and percentage of blossom-end rot. The application of abscisic acid increased the calcium partition to the distal region of the fruits at 30 days after the beginning of flowering, as well as reduced the incidence of blossom-end rot by 86 %, when compared with plants not treated with abscisic acid. It is possible to conclude that the foliar application of abscisic acid can significantly reduce the incidence of blossom-end rot.

scholarly journals ↵​Impact of A Selected Mycorrhizal Complex and A Rhizobacterial Species on Tomato Plants’ Growth under Water Stress Conditions

2021 ◽  
Author(s):  
Slimani Afafe ◽  
Harkousse Oumaima ◽  
Mazri Mouaad Amine ◽  
Zouahri Abdelmajid ◽  
Ouahmane Lahcen ◽  
...  
Keyword(s):  
Water Stress ◽  
Mycorrhizal Fungi ◽  
Growth Parameters ◽  
Water Status ◽  
Field Capacity ◽  
Water Levels ◽  
Stress Conditions ◽  
Bacillus Sp ◽  
Tomato Plants ◽  
The Impact

Background: Plant strategies for adapting to drought could be improved by associations between plant roots and soil microorganisms, including arbuscular mycorrhizal fungi (AMF) and plant growth promoting rhizobacteria (PGPR). In this study, the impact of a selected AMF complex and a selected PGPR species on the growth of tomato (Lycopersicum esculentum Mill.) under induced water stress was evaluated. Methods: Three different inoculation treatments were applied to tomato seedlings (a complex of AMF composed mainly of Glomus genus a Bacillus sp. PGPR treatment and a combination of both) and three different water levels (75%, 50% and 25% of field capacity). Result: A significant damaging impact of drought on tomato growth parameters and root mycorrhizal colonization, although the presence of microbes stimulated tomato plants growth and decreased the impact ofdrought stress. Indeed inoculated plants presented greater heights, fresh and dry weights, leaves number and area; greater water status; and greater proteins, sugars and chlorophylls contents either with the AMF complex or the Bacillus sp. in normal and drought stress conditions compared to the non-inoculated plants. However dual inoculation recorded the highest values under all water levels treatments.

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