Hydraulic conductivity in stem of young plants of Jatropha curcas L. cultivated under irrigated or water deficit conditions

Oliveira, Priscila Souza de; Pereira, Lidiane Silva; Silva, Delmira Costa; Júnior, José Olímpio de Souza; Laviola, Bruno Galvêas; Gomes, Fábio Pinto

doi:10.1016/j.indcrop.2017.12.066

Cited by 10 publications

(11 citation statements)

References 40 publications

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“…In accordance with Santana et al [57] a decrease of 56% to 87% in whole-plant hydraulic conductivity, as well as a 38% decrease in total biomass, resulted in significantly low biomass water use efficiency in water deficit conditions as compared to irrigated plants [57]. Moreover, significant decreases of 57% to 65% in stem Kp were demonstrated in water deficit plants of J. curcas, which were completely recovered after six days of rehydration [12]. The authors also reported no changes in Kp in two of the ten genotypes evaluated, despite the decreases in stomatal conductance and transpiration rate, demonstrating a highly positive characteristic of water use efficiency under drought.…”

Section: Discussionsupporting

confidence: 82%

“…These adjustments in Kp allow plants to optimize their water use, enabling them to survive and thrive in environments prone to seasonal drought. Hydraulic studies on J. curcas are still very scarce [12,53]. In our study, Kp shows a pattern more or less constant, without a defined pattern, but with a tendency to decrease.…”

Section: Discussioncontrasting

confidence: 38%

“…However, other factors may influence equal or greater magnitude in the modulation of photosynthesis. Under salinity, for example, as root cells absorb salt ions , their osmotic potential is reduced, which further reduces the uptake of water from the soil [10], as well as its ascent to the leaves, a process that is called hydraulic conductivity (Kp) [11,12]. Furthermore, a simple increase in CO2 uptake by stomata does not necessarily mean an increase in gas exchange, since CO2 crosses several physical barriers before reaching the RuBisCo carboxylation site [13][14][15][16], a process named mesophilic conductance, analogous to stomatal conductance which is given by the change in CO2 uptake by the stomata.…”

Section: Introductionmentioning

confidence: 99%

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Long Exposure to Salt Stress Leads to Stronger Damage in Chloroplast Ultrastructure and its Functionality than the Stomatal Function in<em> Jatropha curcas</em>

Pompelli¹,

Dias-Pereira²,

Jaraba-Navas³

et al. 2023

Preprint

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As sessile organisms, plants face a wide range of abiotic stresses, with salinity being a prominent constraint affecting their growth, development, and productivity, particularly in arid and semi-arid regions. This study focused on understanding how salinity impacts Jatropha curcas, an important oilseed plant for biodiesel production. By examining the anatomy and ultrastructure of stomata and chloroplasts, we investigated the effects of prolonged salinity stress on J. curcas. This stress led to changes in stomatal density, stomatal index, and ostiole aperture, which case an imbalance of water conductivity in the xylem. Through transmission electron microscopy, we explored the subcellular organization of J. curcas chloroplasts and their contribution to plant photosynthetic efficiency, providing insights into their role in this process. Notably, salinity treatment resulted in a significant increase in starch granules accumulation, leading to impaired the granal and stromal grana lamellae, destroying this ultrastructure. Our findings indicate that the anatomy and ultrastructure of chloroplasts play a crucial role in influencing photosynthetic efficiency and hydraulic conductivity. This study offers new perspectives on the structure and function of chloroplasts in J. curcas, presenting innovative opportunities to develop strategies that enhance biofuel production in areas with high soil salinity.

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Section: Discussionsupporting

confidence: 82%

Section: Discussioncontrasting

confidence: 38%

Section: Introductionmentioning

confidence: 99%

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Long Exposure to Salt Stress Leads to Stronger Damage in Chloroplast Ultrastructure and its Functionality than the Stomatal Function in<em> Jatropha curcas</em>

Pompelli¹,

Dias-Pereira²,

Jaraba-Navas³

et al. 2023

Preprint

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“…According to these authors, the palisade parenchyma was demonstrated to be bi-stratified, different from what was observed in this paper where the palisade parenchyma consisted of a single layer of compact and elongated cells. Oliveira et al (2018) complements this research by demonstrating that changes in the anatomy of J. curcas, including the xylem vessels, favored a greater or lesser drought tolerance of the genotypes when the native or potential hydraulic conductivity were analyzed following water deficiency. The effects of water restriction on the root and leaf anatomy of J. curcas are very well studied.…”

Section: Discussionmentioning

confidence: 59%

Salinity shock in jatropha curcas leaves is more pronounced during recovery than during stress time

Silva-Santos

Corte-Real

Dias-Pereira

et al. 2019

BJD

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To verify the possible morphological and ultrastructural differences in the Jatropha curcas leaves, in response to high-intensity salt stress, three genotypes were evaluated (CNPAE183, JCAL171, and CNPAE218). In all the genotypes, 750mM NaCl, added to the nutrient solution, was applied to test its salt tolerance. For the analysis, the leaves were collected at three time points: (i) before stress (time 0 hour); (ii) during stress time (time 50 hours); and (iii) in the recovery period (time 914 hours) when the stressed plants recovered and demonstrated measurements of net photosynthetic with values similar to those demonstrated by the control plants. We showed that regardless of the genotype, saline shock caused an increase in the thickness of the mesophyll, and after the removal of NaCl, the thicker mesophyll remained in the JCAL171 and CNPAE218 genotypes, while the values observed in the CNPAE183 genotype were similar to those before stress. Scanning electron microscopy indicated that the stomata of CNPAE183 are smaller and have a stomatal index higher than the values demonstrated in JCAL171 and CNPAE218. Therefore, among the genotypes analyzed, CNPAE183 demonstrates that it could be considered a promising genotype for future studies of genetic improvement that seek elite genotypes tolerant to salinity.

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“…Para el caso del comportamiento del Ѱ que se encontró durante la investigación, se puede relacionar con una respuesta fisiológica de la planta a la disponibilidad de agua en el suelo y su distribución en la planta [22] que es limitada por variables atmosféricas [15,18], específicamente para la época de mínima precipitación. La disminución del agua en la zona de raíces implica ejercer una mayor presión para movilizar el agua desde gradientes diferenciales de presión en el complejo suelo-planta-atmósfera [39,40,41,42].La transpiración excesiva se controla por los estomas; se evitan daños de embolia [43,44], aunque se reducen la fotosíntesis y el rendimiento (producción) de la planta, causados por la sequía [45]. Se podría considerar que a partir de nuestros resultados probablemente las plantas de cacao tienen un compartimiento isohídrico debido a que cierran sus estomas y se presenta una caída en el potencial hídrico del suelo, es importante advertir que en nuestro estudio el genotipo evaluado es el CCN 51, ya que se ha mencionado que el genotipo puede incidir [46].…”

Section: Flujo De Savia Y Potencial Hídricounclassified

Los sistemas agroforestales y la incidencia sobre el estatus hídrico en árboles de cacao

Espinosa

Salazar

Churio

et al. 2020

Biotecnol. sector agropecuario agroind.

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El cacao se cultiva bajo sistemas de producción como los agroforestales y libre exposición solar, su uso depende de las regiones agroecológicas donde se cultiva. El manejo del dosel de sombra incide en las condiciones microclimáticas que beneficia el comportamiento hídrico (flujo de savia Vs y potencial hídrico Ѱ) de la planta de cacao. Se evaluó como la modificación del dosel de sombra (sistemas a libre exposición solar SLE y agroforestales con media MPAR y baja BPAR radiación transmitida) afectan el comportamiento hídrico en árboles de cacao en épocas contrastantes de precipitación. Para medir el Vs y Ѱ se instalaron sensores de calor y psicrómetros de tallo en árboles de cacao tipo CCN51. Se encontró un efecto del sistema de producción y época de monitoreo sobre el Vs y Ѱ en las plantas de cacao. El comportamiento del Ѱ fue mayor en SLE en las dos épocas, pero se acentuó más en la época de mínima precipitación. Se encontró un comportamiento contrario en Vs, donde esta variable fue mayor en BPAR durante la época de mínima precipitación. De acuerdo con los resultados obtenidos el manejo de doseles de sombra en cultivos de cacao bajo climas subóptimos incide positivamente en el estatus hídrico.

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Hydraulic conductivity in stem of young plants of Jatropha curcas L. cultivated under irrigated or water deficit conditions

Cited by 10 publications

References 40 publications

Long Exposure to Salt Stress Leads to Stronger Damage in Chloroplast Ultrastructure and its Functionality than the Stomatal Function in<em> Jatropha curcas</em>

Long Exposure to Salt Stress Leads to Stronger Damage in Chloroplast Ultrastructure and its Functionality than the Stomatal Function in<em> Jatropha curcas</em>

Salinity shock in jatropha curcas leaves is more pronounced during recovery than during stress time

Los sistemas agroforestales y la incidencia sobre el estatus hídrico en árboles de cacao

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