Diurnal regulation of photosynthesis in Jatropha curcas under drought during summer in a semi-arid region

Tominaga, Jun; Inafuku, Sayuri; Coetzee, Tidimalo; Kawamitsu, Yoshinobu

doi:10.1016/j.biombioe.2014.05.010

Cited by 16 publications

(16 citation statements)

References 33 publications

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“…When the irrigation was stopped, A decreased at pF 3.5 in pot-grown jatropha plants whereas A in root boxgrown plants decreased at severe water stress (pF 3.8) and thereafter, reaching almost zero at pF 4.0 in both experiments (Figures 3 and 5). Under such severe water stress conditions, jatropha plants closed their stomata for the entire day and minimized water loss (Tominaga et al, 2014). Due to these rapid stomatal closures and maintaining the SPAD value, when the plants were re-watered, the gas exchange rate recovered quickly to the value observed before the stress treatment (Figures 3 and 5).…”

Section: Discussionmentioning

confidence: 92%

“…In previous studies, we attempted to identify the best management practices for jatropha cultivation under semiarid environments in the Republic of Botswana (Inafuku-Teramoto et al, 2013;Ishimoto et al, 2017Ishimoto et al, , 2018Tominaga, Inafuku, Coetzee & Kawamitsu, 2014). In Botswana, with an annual precipitation of less than 500 mm, drought is a common event and considered the major limitation of the jatropha production.…”

Section: Introductionmentioning

confidence: 99%

“…Following the reduction of CO 2 supply, a decrease in the activities of enzymes involved in photosynthesis (a non-stomatal limitation) may also occur (Chaves et al, 2009;Du et al, 1996;Lawlor, 2002). Strict stomatal regulation in jatropha plants under water deficit has been identified in diurnal gasexchange measurements under the field conditions (Tominaga et al, 2014). In general, stomatal limitation increases water use efficiency of photosynthesis whereas non-stomatal limitation decreases the efficiency.…”

Section: Introductionmentioning

confidence: 99%

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Responses of leaf gas exchange rate to acute soil drying in Jatropha curcas L

Nakabaru

Hoang

Watanabe

et al. 2020

Plant Production Science

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Development of a water-efficient irrigation system is essential in order to cultivate Jatropha curcas, a bioenergy crop, in semiarid regions. In the present study, to determine the useful parameter for the efficient irrigation system, jatropha plants were grown in pots and root boxes under greenhouse conditions in Okinawa, Japan. At 6 to 9 months after transplanting, we measured the gas exchange rate during ongoing soil water deficits and attempted to identify the threshold of soil matric potential (pF) with changes of both intrinsic water use efficiency (A/gs) as a stomatal-based index and carboxylation efficiency (A/C i) as an index of non-stomatal limitation. When irrigation was stopped, A and gs began to decline, with each parameter reaching zero at pF 4.0. However, gs was more sensitive to soil water deficits than A. After re-watering, stomatal openings and carbon uptake recovered to the value observed before water stress treatment. At pF 3.5 and higher values (representing more severe water stress), A/gs intended to increase and A/C i sharply decreased. These results suggested that approximately pF 3.5 in the soil was the threshold of non-stomatal limitations to photosynthetic rate and should be useful to the re-watering point for the water-efficient irrigation system in jatropha.

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Section: Discussionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Responses of leaf gas exchange rate to acute soil drying in Jatropha curcas L

Nakabaru

Hoang

Watanabe

et al. 2020

Plant Production Science

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“…Under natural conditions, plants often suffer from a variety of biotic and abiotic stresses, such as drought [1][2][3][4], salt stress [5], high temperature [6], and chilling injury [7][8]. Temperature is the main determinant that affects the geographical distribution and the length of the growing season for most plants [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Physiological and transcriptomic responses of Lanzhou Lily (Lilium davidii, var. unicolor) to cold stress

Tian

Xie

2020

PLoS ONE

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Low temperature induces changes in plants at physiological and molecular levels, thus affecting growth and development. The Lanzhou lily (Lilium davidii, var. unicolor) is an important medicinal plant with high economic value. However, the molecular mechanisms underlying its photosynthetic and antioxidation responses to low temperature still remain poorly understood. This study subjected the Lanzhou lily to the two temperatures of 20˚C (control) and 4˚C (low temperature) for 24 h. Physiological parameters related to membrane integrity, photosynthesis, antioxidant system, and differentially expressed genes were investigated. Compared with control, low temperature increased the relative electrical conductivity by 43.2%, while it decreased net photosynthesis rate, ratio of variable to maximal fluorescence, and catalase activity by 47.3%, 10.1%, and 11.1%, respectively. In addition, low temperature significantly increased the content of soluble protein, soluble sugar, and proline, as well as the activity of superoxide dismutase and peroxidase. Comparative transcriptome profiling showed that a total of 238,109 differentially expressed genes were detected. Among these, 3,566 were significantly upregulated while 2,982 were significantly downregulated in response to low temperature. Gene Ontology enrichment analysis indicated that in response to low temperature, the mostly significantly enriched differentially expressed genes were mainly involved in phosphorylation, membrane and protein kinase activity, as well as photosynthesis, light harvesting, light reaction, and alpha,alpha-trehalose-phosphate synthase activity. Kyoto Encyclopedia of Genes and Genomes enrichment analysis also indicated that the most significantly enriched pathways involved ribosome biogenesis in eukaryotes, phenylalanine metabolism, circadian rhythm, porphyrin and chlorophyll metabolism, photosynthesis of antenna proteins, photosynthesis, and carbon fixation in photosynthetic organisms. Moreover, the expression patterns of 10 randomly selected differentially expressed genes confirmed the RNA-Seq results. These results expand the understanding of the physiological and molecular mechanisms underlying the response of the Lanzhou lily to low temperature stress.

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“…The energy excess at PSII level is dissipated by nonphotochemical mechanisms associated with enhancement in photorespiration, restricting photo-damages [10,16]. In a recent study Tominaga et al [20] found that J. curcas is able to preserve the integrity of photosythem II (PSII), when stomata are closed under drought conditions, and to regulate thermal dissipation, adjusting PSII quantum efficiency to capacity of CO 2 fixation. In parallel, the antioxidant enzymatic protection was beneficial for oxidative damage protection [8,16].…”

Section: Introductionmentioning

confidence: 99%

Physiological Responses to Drought Stress in Jatropha curcas Seedlings

Contran¹,

Ledda²,

Mulas³

et al. 2017

JEAI

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Aims:The aim of the study was to investigate the physiological mechanisms of Jatropha curcas seedlings exposed to drought and the possible influence of seedling age. Study Design: A pot experiment was carried out using a completely randomized design with two seedling ages (2-and 3-month-old seedlings), two treatments per age (Watered: fully irrigated, and Unwatered: Not irrigated), six replicates (24 pots). Place and Duration of Study: The experiment was performed in a greenhouse facility located at the Experimental Station "Mauro Deidda" (Department of Agriculture of University of Sassari) at Ottava (Sassari, Italy) between June and September 2011. JEAI, 16(3): 1-13, 2017; Article no.JEAI.33639 2 Methodology: To investigate the responses of 2-and 3-month-old J. curcas seedlings exposed to drought stress on 4 th , 8 th , 12 th , 19 th , and 26 th day from treatment's beginning, leaf and soil water content, biometric, gas exchange, and chlorophyll a fluorescence measurements were performed; on 26 th day from treatment's beginning, biometric destructive measurements were carried out. Results: Results support the hypothesis that J. curcas is appropriate to be cultivated in areas with limited water availability or prolonged periods of drought and highlight that mechanisms of drought response are highly influenced by seedling age. J. curcas seedlings maintained a good leaf water status by means of an effective stomatal closure, associated with a reduced aboveground growth and an increased root:shoot ratio. Under drought stress, 2-month seedlings showed a higher allocation of resources to roots compared to 3-month seedlings. Drought resulted in more detrimental effects on the photosynthetic response of 3-month seedlings, inducing the reduction of stomata conductance and the loss of photosystem II integrity. 2-month seedlings were instead able to activate mechanisms of drought tolerance through the activation of excess energy dissipation mechanisms. Conclusion: In the early stage of crop establishment, the transplanting of J. curcas 2-month seedlings proved to be more effective in order to avoid water stress related consequences. Original Research Article

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Diurnal regulation of photosynthesis in Jatropha curcas under drought during summer in a semi-arid region

Cited by 16 publications

References 33 publications

Responses of leaf gas exchange rate to acute soil drying in Jatropha curcas L

Responses of leaf gas exchange rate to acute soil drying in Jatropha curcas L

Physiological and transcriptomic responses of Lanzhou Lily (Lilium davidii, var. unicolor) to cold stress

Physiological Responses to Drought Stress in Jatropha curcas Seedlings

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