Physiological Mechanisms Involved with Salt and Drought Tolerance in Jatropha curcas Plants

Silveira, Joaquim Albenísio Gomes da; Silva, Evandro Nascimento; Ferreira‐Silva, Sérgio Luiz; Viégas, Ricardo Almeida

doi:10.1007/978-1-4614-4806-8_7

Cited by 5 publications

(5 citation statements)

References 63 publications

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“…High concentrations of salts in the root zone cause imbalances in nutrient supply to the plant [97,105,106] by competitive interaction of the salts with nutrient ions or by membrane selectivity for the ions [51]. Moreover, plants under salinity stress produce more stress proteins, prolines, and compatible osmolytes [107][108][109]. Thus, being an integral component of the structures and functions, an optimum supply of essential plant nutrients is required for biochemical reactions and synthesis of the biomolecules in stressful environments.…”

Section: Total Amount Of Pigments Produced Per Plantmentioning

confidence: 99%

Response of Chlorophyll, Carotenoid and SPAD-502 Measurement to Salinity and Nutrient Stress in Wheat (Triticum aestivum L.)

2017

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Abiotic stress can alter key physiological constituents and functions in green plants. Improving the capacity to monitor this response in a non-destructive manner is of considerable interest, as it would offer a direct means of initiating timely corrective action. Given the vital role that plant pigments play in the photosynthetic process and general plant physiological condition, their accurate estimation would provide a means to monitor plant health and indirectly determine stress response. The aim of this work is to evaluate the response of leaf chlorophyll and carotenoid (C t ) content in wheat (Triticum aestivum L.) to changes in varying application levels of soil salinity and fertilizer applied over a complete growth cycle. The study also seeks to establish and analyze relationships between measurements from a SPAD-502 instrument and the leaf pigments, as extracted at the anthesis stage. A greenhouse pot experiment was conducted in triplicate by employing distinct treatments of both soil salinity and fertilizer dose at three levels. Results showed that higher doses of fertilizer increased the content of leaf pigments across all levels of soil salinity. Likewise, increasing the level of soil salinity significantly increased the chlorophyll and C t content per leaf area at all levels of applied fertilizer. However, as an adaptation process and defense mechanism under salinity stress, leaves were found to be thicker and narrower. Thus, on a per-plant basis, increasing salinity significantly reduced the chlorophyll (Chl t ) and C t produced under each fertilizer treatment. In addition, interaction effects of soil salinity and fertilizer application on the photosynthetic pigment content were found to be significant, as the higher amounts of fertilizer augmented the detrimental effects of salinity. A strong positive (R 2 = 0.93) and statistically significant (p < 0.001) relationship between SPAD-502 values and Chl t and between SPAD-502 values and C t content (R 2 = 0.85) was determined based on a large (n = 277) dataset. We demonstrate that the SPAD-502 readings and plant photosynthetic pigment content per-leaf area are profoundly affected by salinity and nutrient stress, but that the general form of their relationship remains largely unaffected by the stress. As such, a generalized regression model can be used for Chl t and C t estimation, even across a range of salinity and fertilizer gradients.

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Section: Total Amount Of Pigments Produced Per Plantmentioning

confidence: 99%

Response of Chlorophyll, Carotenoid and SPAD-502 Measurement to Salinity and Nutrient Stress in Wheat (Triticum aestivum L.)

2017

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“…Indicadores de plasticidade fisiológica (IPF) em plantas de pinhão manso expostas ao déficit hídrico. Segundo Silveira et al (2012), a preservação de água nas folhas de pinhão manso está associada a ausência de sintomas de lesões, como secagem das folhas ou clorose. Em paralelo, observou-se nesse estudo a ocorrência de danos a nível de membrana em folhas de pinhão manso corroborando com os resultados encontrados por também observou um aumento nos danos de membrana em pinhão manso sob seca.…”

Section: Resultsunclassified

“…apud SILVEIRA et al, 2012. De acordo com Silveira et al (2012), esse efeito de diminuição da fotossíntese pode ser tanto um processo de aclimatação como uma resposta ao estresse. Simões et al (2009), em estudo com pinhão manso sob diferentes lâminas de irrigação, também observaram diminuição na condutância estomática, problema que também reduz a disponibilidade de CO2.…”

Section: Ipf Em Plantas De Pinhão Mansounclassified

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Indicadores de plasticidade fisiológica como ferramenta para avaliar a tolerância a seca em pinhão manso / Physiological plasticity indicators as a tool to assess dry tolerance in pinhão manso

Freitas¹,

Santos²,

Silva³

2021

BJDV

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Autor para correspondência RESUMO Introdução: O estresse hídrico é um dos fatores abióticos que mais afeta o crescimento e o desenvolvimento das culturas, alterando principalmente seus processos fisiológicos e bioquímicos. O pinhão manso é uma espécie cultivada em regiões semiáridas e diversos estudos têm demonstrado que ela apresenta mecanismos eficientes de tolerância à seca. Objetivo: Identificar indicadores de plasticidade fisiológica como ferramenta para avaliar a tolerância ao déficit hídrico em plantas de pinhão manso. Metodologia: O experimento foi conduzido em condições de casa de vegetação obedecendo um delineamento inteiramente casualizado, onde as plantas foram divididas em dois tratamentos: irrigado (controle) e submetidas ao déficit hídrico por 10 dias. Resultados: Nossos dados mostraram redução na massa fresca (MF) e massa seca (MS) em folhas e raízes quando expostas ao déficit hídrico em comparação ao controle. Por outro lado, o conteúdo relativo de água (CRA) e danos de membrana (DM) aumentaram em folhas de plantas estressadas, em comparação ao controle. Quanto aos parâmetros de trocas gasosas

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“…Plants adapt to adversity of drought and salinity by several physiological adjustment such as osmotic adjustment, water and photosynthetic control, oxidative protection, molecular signaling and gene regulation (Silveira et al 2012). However, some adaptive responses of plants to those stresses are stress-dependent.…”

Section: Introductionmentioning

confidence: 99%

Phenotyping of Plants for Drought and Salt Tolerance Using Infra-Red Thermography

Kwon¹,

Kim²,

Yoon³

et al. 2015

Plant Breed. Biotech.

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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. ABSTRACT Drought and salinity are the major environmental constrains in global agricultural production. Plant breeding for the drought and salt tolerance needs a proper assessment procedure to overcome stress constrain. Fundamental understanding on the physiological nature of the plant tolerance provides valuable information for the genetically modified crop's development. Drought or salt stress induces several common physiological responses in plants such as water relation and photosynthetic capacitiy. It is because both stresses lead cellular dehydration in the plants, particularly, during the early phase of stress imposition. Drought and salinity decrease CO2 availability for photosynthesis via stomatal limitation as well as elevate leaf temperature due to partially closed stomata. In this scenario, stomatal regulation and plant water status are important aspects in abiotic stress environment. These physiological responses have a function to stabilize the temperature inside plant/leaf. Therefore phenotyping through an infra-red thermography (heat sensitive sensor), could be a useful tool in the selection of a tolerant genotypes. Infra-red thermography is a part of the electromagnetic spectrum which emits a certain amount of radiation as a function of their temperatures. In general, the plants which have less water, would have higher temperature and display more infra-red radiations. In abiotic stresses such as drought and salinity, plant water status is affected and varied from the sensitive to tolerant level. Infra-red images of plants are often linked with some of the physiological attributes to the tolerance. This review covers the limits, advantages, linkages, comparison and other prospectives of using thermal imagaes in modern phenotyping techniques.

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Physiological Mechanisms Involved with Salt and Drought Tolerance in Jatropha curcas Plants

Cited by 5 publications

References 63 publications

Response of Chlorophyll, Carotenoid and SPAD-502 Measurement to Salinity and Nutrient Stress in Wheat (Triticum aestivum L.)

Response of Chlorophyll, Carotenoid and SPAD-502 Measurement to Salinity and Nutrient Stress in Wheat (Triticum aestivum L.)

Indicadores de plasticidade fisiológica como ferramenta para avaliar a tolerância a seca em pinhão manso / Physiological plasticity indicators as a tool to assess dry tolerance in pinhão manso

Phenotyping of Plants for Drought and Salt Tolerance Using Infra-Red Thermography

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