Chlorophyll a fluorescence and leaf temperature are early indicators of oil palm diseases

Aucique‐Pérez, Carlos Eduardo; Daza, Edison Steve; Avila-Diazgranados, Rodrigo Andrés; Romero, Hernán Mauricio

doi:10.1590/1678-992x-2018-0106

Cited by 8 publications

(7 citation statements)

References 20 publications

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“…The Quantum yield of PSII represents electron flow beyond PSII (Dintwe and Moseki, 2011). In corroboration (Zivcak et al, 2014), organic amendments contributed to the lower quantum yield of PSII (ΦPSII <0.8) value, and the decrease of ΦPSII may show that the proportion of energy harnessed by chlorophyll to stimulate the photochemical process is not efficiently used (Aucique-Perez et al, 2020). Photosynthesis increases linearly with the increase in leaf N content (Bassi et al, 2018).…”

Section: Chlorophyll Fluorescencementioning

confidence: 81%

“…Plant stress, either biotic or abiotic, is one of the main factors that may effectively trigger physiological disturbances in plants ( Aucique-Perez et al, 2020) due to its effect on chlorophyll parameters. For instance, the greater the plant stress, the fewer the open reaction centers available and the lower Fv/Fm (Murchie and Lawson, 2013) due to photoinhibition, which is brought about by a drop in maximum light absorption efficiency.…”

Section: Discussion Discussion Discussionmentioning

confidence: 99%

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Improving Jatropha curcas L. photosynthesis-related parameters using poultry litter and its biochar

Masocha

Dikinya

Moseki

2021

Not Bot Horti Agrobo

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Poultry litter and biochar contribute to improved plant growth due to their high nutrient content. However, to the best of our knowledge, how incorporating poultry litter and its biochar in soil affects photosynthesis-related parameters of Jatropha curcas L. has not been reported. Therefore, a greenhouse pot experiment was conducted using a complete randomised design with three replicates per treatment to determine the effects of poultry litter, biochar pyrolysed at 350 °C and 750 °C at different application rates (0, 0.5, 1, 2, 3 gkg-1) on Jatropha curcas L. photosynthesis parameters. The control plants recorded the lowest values of photosynthesis-related parameters compared to the treated plants except for water use efficiency. The study observed a significant (P < 0.05) increase in leaf surface area (1807 m2, PL), dark-adapted Fv/Fm ratio, carbon dioxide uptake, and transpiration rate for PL and BC350 with increased application rates, compared to BC750 treatments. BC350 treated plants exhibited higher values (0.79) of Light-adapted Fv’/Fm’. The quantum yield of PSII electron transport displayed an increase with an application rate of 3 gkg-1in PL (0.75) treated soils. Comparing organic amendments used, BC350 exhibited a significantly higher value of carbon dioxide uptake rate (2.67 μmol m-2 s-1) and transpiration rate (2.20 mmol m-2 s-1); however, WUE increased at an application rate of 3 gkg-1 in BC750 (3.8 µmol (CO2) mol-1(H2O)) treated plants. The study results indicate that poultry litter and biochar produced at a lower temperature significantly improved photosynthesis parameters than biochar produced at a higher temperature.

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Section: Chlorophyll Fluorescencementioning

confidence: 81%

Section: Discussion Discussion Discussionmentioning

confidence: 99%

Improving Jatropha curcas L. photosynthesis-related parameters using poultry litter and its biochar

Masocha

Dikinya

Moseki

2021

Not Bot Horti Agrobo

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“…In the early stage of the disease, the chlorophyll value showed a downward trend, but the DSI value showed no significance. Therefore, estimation of the chlorophyll content in the leaves were measured using a SPAD chlorophyll meter and could be used as a physiological index to evaluate the occurrence of diseases in oil palm seedlings [70]. Bud or spear rot (BR) disease is the most destructive disease of oil palm in South America comprising Ecuadorian Amazon, Brazil, southwest Colombia, and Suriname.…”

Section: Pathogens Of Oil Palm Diseasementioning

confidence: 99%

Problems and Prospects of Improving Abiotic Stress Tolerance and Pathogen Resistance of Oil Palm

Lü

Martin

Zhang

et al. 2021

Plants

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Oil palm crops are the most important determinant of the agricultural economy within the segment of oilseed crops. Oil palm growing in their natural habitats are often challenged simultaneously by multiple stress factors, both abiotic and biotic that limit crop productivity and are major constraints to meeting global food demands. The stress-tolerant oil palm crops that mitigate the effects of abiotic stresses on crop productivity are crucially needed to sustain agricultural production. Basal stem rot threatens the development of the industry, and the key to solving the problem is to breed new oil palm varieties resistant to adversity. This has created a need for genetic improvement which involves evaluation of germplasm, pest and disease resistance, earliness and shattering resistance, quality of oil, varieties for different climatic conditions, etc. In recent years, insights into physiology, molecular biology, and genetics have significantly enhanced our understanding of oil palm response towards such stimuli as well as the reason for varietal diversity in tolerance. In this review, we explore the research progress, existing problems, and prospects of oil palm stress resistance-based physiological mechanisms of stress tolerance as well as the genes and metabolic pathways that regulate stress response.

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“…A disease-resistant cultivar usually shows higher rates of photosynthesis, electron transport and dark respiration, eventually reaching high yields in regions where widespread diseases are present [ 17 , 18 ]. However, the presence of a disease in a susceptible plant triggers alterations in morphology, physiological functions and plant integrity that can cause partial or total damage [ 10 ], as these are determinants in the plant’s ability to adapt to specific environmental conditions [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

“…These include: (i) fluctuation of chlorophyll fluorescence and reduced chlorophyll pigmentation [ 24 , 25 , 26 ], (ii) inhibition of photosystem efficiency [ 27 ], (iii) unbalanced accumulation of photoassimilates [ 28 ], (iv) changes in chloroplast structure and function [ 29 ] and (v) decreases in F v /F m , ΦPSII and increases in NPQ heat energy dissipation [ 30 ], and these changes can alter leaf temperature. For example, when pathogens directly or indirectly impair transpiration, the net effect is a lack of thermal regulation resulting in an increase in leaf temperature [ 19 , 31 ].…”

Section: Introductionmentioning

confidence: 99%

Chlorophyll Fluorescence Imaging as a Tool for Evaluating Disease Resistance of Common Bean Lines in the Western Amazon Region of Colombia

Suárez

Vanegas

Contreras

et al. 2022

Plants

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The evaluation of disease resistance is considered an important aspect of phenotyping for crop improvement. Identification of advanced lines of the common bean with disease resistance contributes to improved grain yields. This study aimed to determine the response of the photosynthetic apparatus to natural pathogen infection by using chlorophyll (Chla) fluorescence parameters and their relationship to the agronomic performance of 59 common bean lines and comparing the photosynthetic responses of naturally infected vs. healthy leaves. The study was conducted over two seasons under acid soil and high temperature conditions in the western Amazon region of Colombia. A disease susceptibility index (DSI) was developed and validated using chlorophyll a (Chla) fluorescence as a tool to identify Mesoamerican and Andean lines of common bean (Phaseolus vulgaris L.) that are resistant to pathogens. A negative effect on the functional status of the photosynthetic apparatus was found with the presence of pathogen infection, a situation that allowed the identification of four typologies based on the DSI values ((i) moderately resistant; (ii) moderately susceptible; (iii) susceptible; and (iv) highly susceptible). Moderately resistant lines, five of them from the Mesoamerican gene pool (ALB 350, SMC 200, BFS 10, SER 16, SMN 27) and one from the Andean gene pool (DAB 295), allocated a higher proportion of energy to photochemical processes, which increased the rate of electron transfer resulting in a lower sensitivity to disease stress. This photosynthetic response was associated with lower values of DSI, which translated into an increase in the accumulation of dry matter accumulation in different plant organs (leaves, stem, pods and roots). Thus, DSI values based on chlorophyll fluorescence response to pathogen infection could serve as a phenotyping tool for evaluating advanced common bean lines. Six common bean lines (ALB 350, BFS 10, DAB 295, SER 16, SMC 200 and SMN 27) were identified as less sensitive to disease stress under field conditions in the western Amazon region of Colombia, and these could serve as useful parents for improving the common bean for multiple stress resistance.

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Chlorophyll a fluorescence and leaf temperature are early indicators of oil palm diseases

Cited by 8 publications

References 20 publications

Improving Jatropha curcas L. photosynthesis-related parameters using poultry litter and its biochar

Improving Jatropha curcas L. photosynthesis-related parameters using poultry litter and its biochar

Problems and Prospects of Improving Abiotic Stress Tolerance and Pathogen Resistance of Oil Palm

Chlorophyll Fluorescence Imaging as a Tool for Evaluating Disease Resistance of Common Bean Lines in the Western Amazon Region of Colombia

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