Is a reduction in stomatal conductance the main strategy of Garcinia brasiliensis (Clusiaceae) to deal with water stress?

Gouvêa, Paula Romenya dos Santos; Marenco, Ricardo Antonio

doi:10.1007/s40626-018-0127-0

Cited by 8 publications

(7 citation statements)

References 47 publications

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“…is certainly affected by the arrest of cell growth under enhanced dehydration, leading to the drop of cell water potential and the loss of turgidity (Hsiao, 2003;Simonneau et al, 2017;Turner, 2018). Taken together our results agree with the already established concept that the arrest of cell growth responds to a milder water deficit than that required for a photosynthetic rate reduction (dos Santos Gouvêa and Marenco, 2018;Zhao et al, 2020). Consequently, the limitation of carbon assimilation is not the real cause of cell growth arrest.…”

Section: Discussionsupporting

confidence: 90%

“…In conclusion, Arabidopsis and other plants respond in a similar way to water deficit with a decrease of WC, SC, FW, PLA, and DW and a concomitant increase of sugars and other compatible osmolytes (Mewis et al, 2012;Sperdouli and Moustakas, 2012;dos Santos Gouvêa and Marenco, 2018;Zhao et al, 2020). Although more than 1,000 genes have been identified to be involved in drought response (Seki et al, 2002;Shinozaki and Yamaguchi-Shinozaki, 2007;Lawlor, 2013;Fang and Xiong, 2015), only a few of them have been characterized in terms of induced tolerance to water depletion, combined with enhanced plant productivity in model plants, as well as in important agricultural crops (Skirycz et al, 2011).…”

Section: Discussionmentioning

confidence: 84%

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Responsiveness of Early Response to Dehydration Six-Like Transporter Genes to Water Deficit in Arabidopsis thaliana Leaves

et al. 2021

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Drought is one of the main abiotic stresses, which affects plant growth, development, and crop yield. Plant response to drought implies carbon allocation to sink organs and sugar partitioning between different cell compartments, and thereby requires the involvement of sugar transporters (SUTs). Among them, the early response to dehydration six-like (ESL), with 19 members in Arabidopsis thaliana, form the largest subfamily of monosaccharide transporters (MSTs) still poorly characterized. A common feature of these genes is their involvement in plant response to abiotic stresses, including water deficit. In this context, we carried out morphological and physiological phenotyping of A. thaliana plants grown under well-watered (WW) and water-deprived (WD) conditions, together with the expression profiling of 17 AtESL genes in rosette leaves. The drought responsiveness of 12 ESL genes, 4 upregulated and 8 downregulated, was correlated to different water statuses of rosette leaves. The differential expression of each of the tandem duplicated AtESL genes in response to water stress is in favor of their plausible functional diversity. Furthermore, transfer DNA (T-DNA) insertional mutants for each of the four upregulated ESLs in response to water deprivation were identified and characterized under WW and WD conditions. To gain insights into global sugar exchanges between vacuole and cytosol under water deficit, the gene expression of other vacuolar SUTs and invertases (AtTMT, AtSUC, AtSWEET, and AtβFRUCT) was analyzed and discussed.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionmentioning

confidence: 84%

Responsiveness of Early Response to Dehydration Six-Like Transporter Genes to Water Deficit in Arabidopsis thaliana Leaves

et al. 2021

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“…However, some species adapted to arid and semiarid climate regions can reach this value without tissue death, which may be the case of M. tenuiflora plants in this research, since after the resumption of the supply of adequately restored their water status. These results agree with those found in the literature, in Handroanthus impetiginosus (Pessoa et al 2017), Myracrodruon urundeuva (Costa et al, 2015), Hevea brasiliensis (Chen et al, 2010), and Quercus pubecens (Gallé et al ., 2007).…”

Section: Discussionsupporting

confidence: 93%

Gas Exchange of Mimosa tenuiflora (Willd.) Poiret Under Water Deficit and Rewatering

Alves

Freire

2019

JAS

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This research aimed to evaluate the physiological responses of Mimosa tenuiflora plants submitted to variable water availability conditions during the nursery stage. Twelve-month-old plants kept in plastic pots containing 5 kg of the substrate composed of the subsoil soil mixture and bovine manure (2:1) were submitted to two treatments: irrigated (control) and water stress, which was imposed through the suspension of irrigation, rewatering after seven days of stress. The relative water content (RWC) and stomatal parameters were evaluated. The M. tenuiflora plants responded quickly to the irrigation suspension, promoting the closure of the stomata, occurring reduction in stomatal conductance, transpiration rate and photosynthesis. The instantaneous efficiency in water use of plants under water deficit remained high only until the middle of the period when irrigation was suspended, and then declined until the last day of the water deficit. After rehydration, the plants showed recovery in all evaluated parameters, indicating that the level of stress imposed did not cause irreversible damages in the cells and tissues.

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“…This effect can be attributed to the fact that cell division, leaf expansion, and protein synthesis are inhibited by water stress, as water deficit may induce the accumulation of abscisic acid, which promotes changes in gene expression (Kaur & Asthir, 2017;Mittler & Blumwald, 2015). Even in circumstances in which drought stress is not quite severe to cause plant death, it has been found that drought stress may lead to a decrease of leaf area and plant biomass, thus reducing growth (Kaur & Asthir, 2017;Gouvêa & Marenco, 2018;Nóia Júnior et al, 2020).…”

Section: Resultsmentioning

confidence: 99%

“…Thus, under water deficit condition, plants may either avoid transpiration or increase water uptake by often employing a combination of strategies to cope with drought stress (Kaur & Asthir, 2017). Transpiration can be lowered by stomatal closure and increased leaf shading (or reduced leaf area), while osmotic adjustments and an increase of the root/shoot ratio can improve water uptake (Goufo et al, 2017;Kaur & Asthir, 2017;Gouvêa & Marenco, 2018).…”

Section: Introductionmentioning

confidence: 99%

Successive cycles of soil drying and wetting improve tolerance to drought in mangabeira

Fernando,

Marenco

2023

Pesq. agropec. bras.

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The objective of this work was to evaluate biomass accumulation and photosynthesis in mangabeira, in response to water deficit and to successive soil drying and wetting cycles. Seedlings were grown in pots and subjected to the three following water regimes: soil at 35, 70, and 100% of field capacity (FC), followed by a drying-down period until photosynthesis (measured weekly) was close to zero. Then, the seedlings were rewatered until completing four drying-wetting cycles. The control treatment was a permanently well-irrigated soil. There was a decline in biomass accumulation under water deficit conditions. Photosynthesis responded to soil rewatering only at 70 and 100% FC and was null at 35% FC. The elapsed time for photosynthesis to reach a null value after rewatering increases with successive drying-wetting cycles. In soil at 100% FC, for photosynthesis to approach zero, it takes five weeks in the first and eight weeks in the last rewatering cycle. Photosynthesis improves with progressive drying-wetting cycles, particularly in soil at 100% FC. The pre-acclimation of mangabeira to drying-wetting cycles should be considered before transplanting the seedlings in the field, and pre-acclimation should be carried out initially with soil at its FC.

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Is a reduction in stomatal conductance the main strategy of Garcinia brasiliensis (Clusiaceae) to deal with water stress?

Cited by 8 publications

References 47 publications

Responsiveness of Early Response to Dehydration Six-Like Transporter Genes to Water Deficit in Arabidopsis thaliana Leaves

Responsiveness of Early Response to Dehydration Six-Like Transporter Genes to Water Deficit in Arabidopsis thaliana Leaves

Gas Exchange of Mimosa tenuiflora (Willd.) Poiret Under Water Deficit and Rewatering

Successive cycles of soil drying and wetting improve tolerance to drought in mangabeira

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