Gas exchange and photosynthetic activity in Hancornia speciosa gomes seedlings under water deficit conditions and during rehydration

Scalon, Silvana de Paula Quintão; Kodama, Fávia Mitsuko; Dresch, Daiane Mugnol; Mussury, Rosilda Mara; Pereira, Zefa Valdivina

doi:10.14393/bj-v31n4a2015-26088

Cited by 14 publications

(15 citation statements)

References 30 publications

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“…This was similar to observations recorded for Hancornia speciosa Gomes (Scalon et al, 2015), Myracrodruon urundeuva Allemão (Costa et al, 2015), Khaya ivorensis A. Chev (Albuquerque et al, 2013), Eucalyptus and Acacia spp. (Warren et al, 2011), Tabebuia aurea S. Manso (Oliveria et al, 2011), and Carapa guianensis Fusée-Aublet (Gonçalves et al, 2009) seedlings.…”

Section: Discussionsupporting

confidence: 90%

“…Similar results to those obtained for C. xanthocarpa were observed in other species. In H. speciosa, stomatal conductance recovery (63%) occurred six days after rehydration, yet at lower levels when compared to irrigated plants, suggesting that the stomata in those species are slow in recuperating hydration (Scalon et al, 2015). Likewise, 60% recovery of stomatal conductance was observed in Populus euphratica after six days of rehydration (Bogeat-Triboulot et al, 2007), while in Bactris gasipaes Kunth seedlings, 50% recovery of stomatal conductance occurred three days after water was added back to the soil (Oliveira et al, 2002).…”

Section: Discussionmentioning

confidence: 98%

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Potential for recovery of Campomanesia xanthocarpa Mart. ex O. berg seedlings from water deficit

Bento¹,

Scalon²,

Dresch³

et al. 2016

Afr. J. Agric. Res.

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The objective of this study is to evaluate the effect of water deficit and the recovery potential following rehydration, on the metabolism of Campomanesia xanthocarpa seedlings. The seedlings were distributed in two groups: the first group was the control, in which, plants were hydrated periodically in order to maintain 70% water holding capacity and the second was the treatment group characterized by stress, in which irrigation was suspended until the photosynthetic rate showed levels close to zero, at which point the plants were once again rehydrated with subsequent daily irrigation for one week, maintaining the water holding capacity at 70%. C. xanthocarpa shows a reduction in stomatal conductance and photosystem PSII efficiency. Water deficit decreases the water potential in the leaves and all the traits of the photosynthetic metabolism in C. xanthocarpa seedlings in twenty days of suspension of irrigation. These are later recovered with the re-establishment of the water supply. However, exposure of the seedlings to a second cycle of water deficit during the evaluation period demonstrated that the metabolism traits do not re-establish equilibrium.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionmentioning

confidence: 98%

Potential for recovery of Campomanesia xanthocarpa Mart. ex O. berg seedlings from water deficit

Bento¹,

Scalon²,

Dresch³

et al. 2016

Afr. J. Agric. Res.

View full text Add to dashboard Cite

show abstract

“…This behavior might be explained by observing the net CO2 assimilation rate pattern, which reached its maximum value at the same time and by the stomatal limitation, that reduces CO2 diffusion. Scalon et al (2015) also observed reduced carboxylation efficiency limited by Rubisco, in Hancornia speciosa seedlings submitted to water deficit. In the same sense, when studying bean plants under salinity stress and nitrogen fertilization, Furtado et al (2013) state that the iCE reduction occurred mainly due to decreased photosynthetic rates.…”

Section: Gas Exchangementioning

confidence: 62%

Gas exchanges in sugar apple (Annona squamosa L.) subjected to salinity stress and nitrogen fertilization

et al. 2019

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Salinity is one of the modern agriculture major obstacles, causing several physiological disturbances in plants, adversely affecting its growth and development. Therefore, some techniques are required in order to alleviate the negative effects of salinity stress on plants, as for example an adequate nitrogen fertilization. The aim of this study was to assess the ecophysiological responses of sugar apple plants (Annona squamosa L.) submitted to different salinity levels and nitrogen fertilization doses. The experimental design was a randomized block in an incomplete factorial scheme, with five electrical conductivities of the irrigation water (ECw: 0.5, 1.01, 2.25, 3.49 and 4.0 dS m-1) and five nitrogen doses (0, 101, 350, 598.2 and 700 mg dm-3), with four replicates, generated from the Box Central Composite experimental design matrix. Through a daily course, it was observed variations in gas exchange, chlorophyll content and fluorescence parameters. The gas exchange, chlorophyll content and fluorescence parameters were measured on photosynthetically active leaves. There was significant interaction between the salinity levels (ECw) and nitrogen doses for the chlorophyll indexes. The electrical conductivity of the irrigation water caused significant negative effects on chlorophyll fluorescence. Therefore, it can be stated that the sugar apple plants ecophysiology varies through the day and that salinity affects its chlorophyll content and fluorescence.

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“…of this decrease in the stomatal flow through the lower ratio of carboxylation of Rubisco (A/ Ci) (Scalon et al, 2015). Plants susceptible to flooding also have stomatal closure as an osmotic equilibrium and critical response to leaf dehydration prevention (Ashraf, 2003).…”

Section: Resultsmentioning

confidence: 99%

Goosegrass: Morphophysiological Characterization Under Water Excess Conditions

et al. 2019

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Eleusine indica (L.) Gaertn. (goosegrass) is a grass species that has global prominence as a weed in areas typical of the soybean crop. However, its dispersion in recent years has been reported expressively for areas of poorly drained soil, in which irrigated rice is cultivated (lowlands). Little is known on its behavior and biology in this different ecosystem. This study aimed to evaluate if Eleusine indica can survive and withstand flooding. The experimental design was a completely randomized (two-way), in which two E. indica biotypes, one from the uplands (without flooding) and the other from the lowlands (with flooding), were submitted to three soil water conditions: 50 and 100% water retention capacity and soil under water depth. Photosynthetic and gas exchange parameters (photosynthetic rate, stomatal conductance, intercellular CO2 concentration, transpiration, water use efficiency, and assimilation rate by Rubisco) were determined. Morphological diversity of biotypes was evaluated through descriptors. The existence of typical lowland biotype could not be characterized. However, both biotypes were able to survive, develop, and generate seeds in a flooded environment in the irrigated rice system.

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Gas exchange and photosynthetic activity in Hancornia speciosa gomes seedlings under water deficit conditions and during rehydration

Cited by 14 publications

References 30 publications

Potential for recovery of Campomanesia xanthocarpa Mart. ex O. berg seedlings from water deficit

Potential for recovery of Campomanesia xanthocarpa Mart. ex O. berg seedlings from water deficit

Gas exchanges in sugar apple (Annona squamosa L.) subjected to salinity stress and nitrogen fertilization

Goosegrass: Morphophysiological Characterization Under Water Excess Conditions

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