Photochemical activity in early-developmental phases of Agave angustifolia subsp. tequilana under induced global warming: Implications to temperature stress and tolerance

Aragón-Gastélum, José Luis; Ramírez-Benítez, José Efraín; González-Durán, Enrique; González-Salvatierra, Claudia; Ramírez-Tobías, Hugo M.; Flores, Joel; Gutiérrez‐Alcántara, Eduardo J.; Méndez-Guzmán, Evelyn; Jarquin-Gálvez, Ramón

doi:10.1016/j.flora.2019.151535

Cited by 11 publications

(4 citation statements)

References 56 publications

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“…The fluorescence analyses of chlorophyll a showed that P. guamacho had the lowest values for Φ Po (Fv/Fm) and PI ABS , indicating low levels of electron transfer or heat dissipation strategies. This is consistent with the reports by Aragón-Gastélum et al [60] and Jardim et al [61] who indicated that succulent species in Cactaceae and Agavaceae families have low levels of ETR and high levels of NPQ that contribute to tolerance to adverse factors in semi-arid environments. Similarly, P. guamacho had the highest values for ABS/RC, DIo/RC, TRo/RC, ETo/RC, REo/RC, and DIo/CSo, which indicated a possible inhibition in the transfer of electrons through the accumulation of excess light energy, with possible effects on the reoxidation of the electron donor, resulting in the accumulation of P680 + (PSII RC) [27,28], or a possible reduction in the activity of PSII active reaction centers via the inactivation of the oxygen evolving complex (OEC) [62].…”

Section: Discussionsupporting

confidence: 93%

Foliar Functional Traits of Resource Island-Forming Nurse Tree Species from a Semi-Arid Ecosystem of La Guajira, Colombia

Toro-Tobón¹,

Alvarez-Flórez²,

Mariño-Blanco³

et al. 2022

Plants

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Semi-arid environments characterized by low rainfall are subject to soil desertification processes. These environments have heterogeneous landscapes with patches of vegetation known as resource islands that are generated by nurse species that delay the desertification process because they increase the availability of water and nutrients in the soil. The study aimed to characterize some foliar physiological, biochemical, and anatomical traits of three nurse tree species that form resource islands in the semi-arid environment of La Guajira, Colombia, i.e., Haematoxylum brasiletto, Pithecellobium dulce, and Pereskia guamacho. The results showed that H. brasiletto and P. dulce have sclerophyllous strategies, are thin (0.2 and 0.23 mm, respectively), and have a high leaf dry matter content (364.8 and 437.47 mg/g). Moreover, both species have a high photochemical performance, reaching Fv/Fm values of 0.84 and 0.82 and PIABS values of 5.84 and 4.42, respectively. These results agree with the OJIP curves and JIP parameters. Both species had a compact leaf with a similar dorsiventral mesophyll. On the other hand, P. guamacho has a typical succulent, equifacial leaf with a 97.78% relative water content and 0.81 mm thickness. This species had the lowest Fv/Fm (0.73) and PIABS (1.16) values and OJIP curve but had the highest energy dissipation value (DIo/RC).

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Section: Discussionsupporting

confidence: 93%

Foliar Functional Traits of Resource Island-Forming Nurse Tree Species from a Semi-Arid Ecosystem of La Guajira, Colombia

Toro-Tobón¹,

Alvarez-Flórez²,

Mariño-Blanco³

et al. 2022

Plants

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“…However, in S. album plants subjected to only drought stress, the levels of the F v /F m and F v /F o parameters were maintained at equivalent levels to those determined in the control leaves, which may be one of the prerequisites to drought‐tolerance. As compared to S. album plants, P. oleracea plants exhibited more resistance to photoinhibition under combined stress conditions because of their ability to accumulate higher levels of carotenoids which play a major role in light harvesting and photoprotection processes (Habibi and Ajori 2015, Aragón‐Gastélum et al 2020).…”

Section: Discussionmentioning

confidence: 99%

Comparison of CAM expression, photochemistry and antioxidant responses in Sedum album and Portulaca oleracea under combined stress

Habibi

2020

Physiologia Plantarum

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Previous studies of crassulacean acid metabolism (CAM) pathway during stress have been directed at individual drought and salinity stress, here, we studied the effects of a combination of drought and salt on CAM expression, chlorophyll fluorescence and antioxidant parameters in the C 3-CAM facultative Sedum album and C 4-CAM facultative Portulaca oleracea plants. While salinity alone was not able to induce functional CAM expression in P. oleracea leaves, we showed that salinity induced low level of nocturnal acid accumulation in S. album species. After 20 d of exposure to the combination of simultaneous salt and drought stress, P. oleracea plants exhibited more resistance to photoinhibition as compared to S. album plants. The decrease of maximum quantum yield (F v /F m) in S. album leaves under combined stress was in parallel with the largest suppression of CAM expression of >50%, probably displaying the withdrawal of functional CAM back to C 3 pathway. However, under drought treatment alone, S. album plants exhibited higher photosynthetic flexibility, which was associated with the up-regulation of antioxidant enzymes activities and maintenance of glutathione (GSH) pool, and consequently higher photochemical functioning. The levels of nitric oxide (NO) correlated well with CAM expression, which was observed only in S. album, suggesting that NO acts in a different way in C 3 and C 4 species during CAM induction. Additionally, in both species, over the course of CAM induction, the changes in CAM expression parameters exhibited a similar pattern to that of antioxidant capacity and photochemical functioning parameters.

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“…Based on this, it is possible to evaluate both the function of photosynthetic apparatus and the effects of environmental stress on plants. Environmental stress mainly damages the photosynthetic apparatus of PSII, and PSII will adjust the rate of electron transport and photochemical efficiency in response to the weakened ability of CO 2 assimilation ( Aragón-Gastélum et al, 2020 ; Hasanuzzaman et al, 2013 ). The damage caused by excess light energy to the system will be mitigated by heat dissipation.…”

Section: Discussionmentioning

confidence: 99%

“…Among the environmental factors, ambient temperature and soil water content are two major abiotic factors in the limitation of plant distribution and productivity ( Küsters et al, 2021 ; Yan, Zhong & Shangguan, 2020 ; Kumari et al, 2021 ). Their change will directly and/or indirectly influence plant physiological processes, such as resource allocation ( Farfan-Vignolo & Asard, 2012 ; Forbesa et al, 2020 ), net photosynthetic rate ( Shao et al, 2021 ; Yamori, Hikosaka & Way, 2014 ), carboxylation efficiency ( Liu et al, 2022 ), photochemical efficiency of photosystem II (PSII) ( Aragón-Gastélum et al, 2020 ; Song et al, 2016a ) and water use efficiency ( Liu et al, 2019 ), which then impact the global carbon cycling. Among all the plant physiological processes, photosynthesis plays an important role in substance metabolism ( Ort et al, 2015 ; Zhu et al, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Effect of precipitation change on the photosynthetic performance of Phragmites australis under elevated temperature conditions

Teng

Liu

Chu

et al. 2022

PeerJ

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Background As a fundamental metabolism, leaf photosynthesis not only provides necessary energy for plant survival and growth but also plays an important role in global carbon fixation. However, photosynthesis is highly susceptible to environmental stresses and can be significantly influenced by future climate change. Methods In this study, we examined the photosynthetic responses of Phragmites australis (P. australis) to three precipitation treatments (control, decreased 30%, and increased 30%) under two thermal regimes (ambient temperature and +4 °C) in environment-controlled chambers. Results Our results showed that the net CO2 assimilation rate (Pn), maximal rate of Rubisco (Vcmax), maximal rate of ribulose-bisphosphate (RuBP) regeneration (Jmax) and chlorophyll (Chl) content were enhanced under increased precipitation condition, but were declined drastically under the condition of water deficit. The increased precipitation had no significant effect on malondialdehyde (MDA) content (p > 0.05), but water deficit drastically enhanced the MDA content by 10.1%. Meanwhile, a high temperature inhibited the positive effects of increased precipitation, aggravated the adverse effects of drought. The combination of high temperature and water deficit had more detrimental effect on P. australis than a single factor. Moreover, non-stomatal limitation caused by precipitation change played a major role in determining carbon assimilation rate. Under ambient temperature, Chl content had close relationship with Pn (R2 = 0.86, p < 0.01). Under high temperature, Pn was ralated to MDA content (R2 = 0.81, p < 0.01). High temperature disrupted the balance between Vcmax and Jmax (the ratio of Jmax to Vcmax decreased from 1.88 to 1.12) which resulted in a negative effect on the photosynthesis of P. australis. Furthermore, by the analysis of Chl fluorescence, we found that the xanthophyll cycle-mediated thermal dissipation played a major role in PSII photoprotection, resulting in no significant change on actual PSII quantum yield (ΦPSII) under both changing precipitation and high temperature conditions. Conclusions Our results highlight the significant role of precipitation change in regulating the photosynthetic performance of P. australis under elevated temperature conditions, which may exacerbate the drought-induced primary productivity reduction of P. australis under future climate scenarios.

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Photochemical activity in early-developmental phases of Agave angustifolia subsp. tequilana under induced global warming: Implications to temperature stress and tolerance

Cited by 11 publications

References 56 publications

Foliar Functional Traits of Resource Island-Forming Nurse Tree Species from a Semi-Arid Ecosystem of La Guajira, Colombia

Foliar Functional Traits of Resource Island-Forming Nurse Tree Species from a Semi-Arid Ecosystem of La Guajira, Colombia

Comparison of CAM expression, photochemistry and antioxidant responses in Sedum album and Portulaca oleracea under combined stress

Effect of precipitation change on the photosynthetic performance of Phragmites australis under elevated temperature conditions

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