High throughput phenotyping of canopy water mass and canopy temperature in well-watered and drought stressed tropical maize hybrids in the vegetative stage

Winterhalter, Loïc; Mistele, Bodo; Jampatong, Sansern; Schmidhalter, Urs

doi:10.1016/j.eja.2011.03.004

Cited by 90 publications

(69 citation statements)

References 36 publications

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“…Além do mais, altas temperaturas foliares estão relacionadas com a redução da fixação de carbono nas diversas etapas da fotossíntese (Medlyn et al, 2002). Essa variação na temperatura foliar e do dossel foliar podem ser utilizados para estimar o estresse hídrico das plantas, como observado na cultura do milho (Tilling et al, 2007;Winterhalter et al, 2011). Em estudos sobre indicadores de déficit hídrico, Kirkham (2005) sugeriu aprofundamento nas avaliações de temperatura foliar, com termômetro infravermelho, para obter índices de estresse hídrico.…”

Section: Resultsunclassified

Caracterização Do Tomateiro Submetido Ao Déficit Hídrico

Morales¹,

Resende

Bordini

et al. 2015

RSA

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RESUMOO experimento foi conduzido com o objetivo avaliar as características morfofisiológicas do tomateiro quando submetido a diferentes níveis de déficit hídrico e, com base nesses resultados, indicar os melhores caracteres para seleção de plantas com maior resistência ao déficit hídrico. O delineamento experimental foi em blocos casualizados, com quatro repetições, no esquema de parcelas subdivididas, em que os tratamentos principais (parcelas) foram constituídos por duas linhagens (TOM-684 e M-82) e as subparcelas por quatro níveis de umidade do solo (100 %, 75 %, 50 % e 25 % da capacidade de campo). Foram avaliados os seguintes caracteres: produção de frutos, massa fresca e seca das folhas, caule e sistema radicular, diâmetro do caule, altura das plantas, número de folhas, fotossíntese, transpiração, temperatura foliar, umidade intercelular, dióxido de carbono intercelular, condutância estomática, condutância de CO 2 intercelular e condutância total. Com a redução da umidade do solo houve redução do número de folhas, altura das plantas, massa fresca e seca das folhas, caule e sistema radicular, transpiração, taxa fotossintética, produção de frutos e aumento da temperatura foliar. A condutância estomática diferiu entre as duas linhagens, com maiores valores para a cultivar TOM-684, que reduziu a condutância estomática de 0,70 para 0,25 mol m -2 s -1 entre os níveis de 100 e 25 % da capacidade de campo. A altura das plantas e o número de folhas podem ser utilizadas em programas de melhoramento como ferramenta para seleção de plantas com maior resistência ao déficit hídrico.Palavras-chave: Solanum lycopersicum; Tolerância a seca; Déficit hídrico; Eficiência do uso da água. ABSTRACTThe experiment was conducted to evaluate the morphological/physiological characteristics of tomato plants when submitted to different levels of water deficit and, based on these results, indicate the best characters for the selection of plants with more tolerance to water deficit. The experimental delineation was in randomized complete block design, with four replications, arranged in splitplot, in which the main treatments (plots) were composed by two strains (TOM-684 and M-82) and the subplots, by four levels of soil moisture (100 %, 75 %, 50 % and 25 % of the field capacity). The following parameters were evaluated: fruit production, leaf, stem and root system fresh and dry mass, , stem diameter, plant height, number of leaves, photosynthesis, transpiration, foliar temperature, intracellular moisture, intracellular carbon dioxide, stomatal conductance, conductance of intracellular CO 2 and total conductance. With the reduction of soil moisture occurred reduction in the number of leaves, plant height and leaf, stem and root system fresh and dry mass, transpiration, photosynthetic rate, fruit production and increase of foliar temperature The stomatal conductance differed between both strains, with higher values for the TOM-684 strain, which reduced stomatal conductance from 0,70 to 0,25 mol m -2 s -1 between levels of 100 and 25 % of...

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Section: Resultsunclassified

Caracterização Do Tomateiro Submetido Ao Déficit Hídrico

Morales¹,

Resende

Bordini

et al. 2015

RSA

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“…Peñuelas et al (1993) and Peñuelas and Inoue (1999) also found that the spectral reflectance indexes WBI and WBI/NDVI showed strong correlation with relative water content in a variety of crops. Winterhalter et al (2011) also identified better relationships to the water status of different maize genotypes under moisture stress in the VIS/NIR range. Elsayed et al (2011) reported that it is advantageous to combine information from both the Table 2. visible and infrared regions (as WBI/NDVI and (R 940 / R 960 )/NDVI) to measure the water status of wheat crops such as the leaf water potential.…”

Section: Discussionmentioning

confidence: 99%

“…Under salinity conditions, the normalized difference vegetation index (NDVI) and the spectral reflectance ratio R 780 :R 550 showed significant correlation with the fresh weight, the water content of the aboveground biomass, and the water potential of the youngest fully developed leaf in wheat (Hackl et al, 2013). Furthermore, a number of optimized indices have been developed to better estimate various agronomic parameters such as plant biomass, plant vigor, biomass partitioning between spikes and vegetative plant parts, and final grain yield (Royo et al, 2004;Babar et al, 2006;Teal et al, 2006;Winterhalter et al, 2011;Erdle et al, 2013aErdle et al, , 2013bKipp et al, 2014b).…”

Section: Introductionmentioning

confidence: 99%

Spectral reflectance indices as a rapid and nondestructive phenotyping tool for estimating different morphophysiological traits of contrasting spring wheat germplasms under arid conditions

El-Hendawy¹,

Al-Suhaibani²,

Salem³

et al. 2015

Turk J Agric For

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IntroductionArid and semiarid regions are seriously lacking in fresh water. Water shortages in these regions have become the basic norm rather than the exception. Most importantly, the situation of water shortage is growing worse due to abrupt climatic changes and continuous population growth. All of these factors will decrease the amount of water allocated to the agricultural sector, which consumes about 75% of the available water supply. Therefore, as the water supply for agronomic purposes becomes insufficient, development of new germplasms with higher yield potential becomes more imperative and it will be one of the major adaptation strategies to sustain crop productions under arid and semiarid conditions. In order to improve the germplasms for these conditions in breeding programs, it is essential to evaluate a large number of germplasms using multiple selection criteria. Several morphophysiological traits, particularly those related to crop processes, yield characteristics, and drought-tolerance mechanisms such as the water status of plants, photosynthetic efficiency, stomatal conductance, canopy temperature, accumulation of dry matter, staygreen character of leaves, harvest index, moisture stress index, and water use efficiency, are usually effective as useful complementary selection criteria for screening germplasms under different environmental conditions (

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“…For example, Winterhalter et al (2011) estimated canopy water mass of tropical maize hybrids based on spectral reflectance and showed that it can be used as a high throughput tool to discriminate between groups with different drought resistance. Gutierrez et al (2010) gives an overview of the relation of spectral indices such as NDVI, NDWI and WI to plant water status measured by relative water content and/or leaf water potential in different wheat genotypes.…”

Section: Breeding For Dehydration Avoidancementioning

confidence: 99%

Management of crop water under drought: a review

Bodner

Nakhforoosh

Kaul

2015

Agron. Sustain. Dev.

437

234

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Drought is a predominant cause of low yields worldwide. There is an urgent need for more water efficient cropping systems facing large water consumption of irrigated agriculture and high unproductive losses via runoff and evaporation. Identification of yield-limiting constraints in the plant-soil-atmosphere continuum are the key to improved management of plant water stress. Crop ecology provides a systematic approach for this purpose integrating soil hydrology and plant physiology into the context of crop production. We review main climate, soil and plant properties and processes that determine yield in different water-limited environments. From this analysis, management measures for cropping systems under specific drought conditions are derived. Major findings from literature analysis are as follows. (1) Unproductive water losses such as evaporation and runoff increase from continental in-season rainfall climates to storage-dependent winter rainfall climates. Highest losses occur under tropical residual moisture regimes with short intense rainy season. (2) Sites with a climatic dry season require adaptation via phenology and water saving to ensure stable yields. Intermittent droughts can be buffered via the root system, which is still largely underutilised for better stress resistance. (3) At short-term better management options such as mulching and date of seeding allow to adjust cropping systems to site constraints. Adapted cultivars can improve the synchronisation between crop water demand and soil supply. At long term, soil hydraulic and plant physiological constraints can be overcome by changing tillage systems and breeding new varieties with higher stress resistance. (4) Interactions between plant and soil, particularly in the rhizosphere, are a way towards better crop water supply. Targeted management of such plant-soil interactions is still at infancy.We conclude that understanding site-specific stress hydrology is imperative to select the most efficient measures to mitigate stress. Major progress in future can be expected from crop ecology focussing on the management of complex plant (root)-soil interactions.

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High throughput phenotyping of canopy water mass and canopy temperature in well-watered and drought stressed tropical maize hybrids in the vegetative stage

Cited by 90 publications

References 36 publications

Caracterização Do Tomateiro Submetido Ao Déficit Hídrico

Caracterização Do Tomateiro Submetido Ao Déficit Hídrico

Spectral reflectance indices as a rapid and nondestructive phenotyping tool for estimating different morphophysiological traits of contrasting spring wheat germplasms under arid conditions

Management of crop water under drought: a review

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