Gas exchanges in annonaceae species under different crop protections

Báron, Daniel; Ferreira, Gisela; Rodrigues, João Domingos; Macedo, Ana Cláudia; Amaro, Amanda Cristina Esteves

doi:10.1590/s0100-29452014000500028

Cited by 4 publications

(7 citation statements)

References 19 publications

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“…The quantum yield of PSII (Fv/Fm) decreased until 1:00 p.m., then its values started to increase and were close to those found at 7:00 p.m. (Fig 3D). According to Baron et al (2014), the temperature of the roots is a factor that influences the Annonaceae plants, which may lead to the reduction of photosynthesis and phytomass production. This may be one of the factors that influenced the quantum yield of PSII, since during the highest temperature, at 1:00 p.m., Fv/Fm presented the lowest mean value (0.71).…”

Section: Chlorophyll Fluorescencementioning

confidence: 99%

“…In addition, the plants water absorption capacity is reduced due to decreased osmotic potential (Parihar et al, 2014). Plant metabolic activity rates are influenced by both biotic and abiotic factors (Baron et al, 2014). Sugar apple plants (Annona squamosa L.) under high salt concentrations have their gas exchanges and chlorophyll fluorescence reduced, which reveals the species sensitiveness to salinity stress (Marler and Zozor, 1996;Sá et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Chlorophyll Fluorescencementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2019

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“…terra-fria predominantly occurred in subtropical and tropical regions of the globe, experiencing higher environmental temperatures (Paul et al 1992). However, the terra-fria variety has exhibited the greatest adaptation to milder temperature conditions (Baron et al 2014;Tokunaga 2005), which may explain the greater stomatal opening of ATM plants during the hottest hours of the day.…”

Section: Discussionmentioning

confidence: 99%

Leaf gas exchanges responses of atemoya scion grafted onto Annona rootstocks

Báron

Amaro

Campos

et al. 2018

Theor. Exp. Plant Physiol.

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We examined the hypothesis that leaf gas exchange of scion is affected by different rootstocks in wood plants. We investigated daily courses of gas exchange and photosynthetic potential using the CO 2 assimilation rates as a function of photosynthetic photon flux density, and then assessed CO 2 response curves in atemoya scion (Annona 9 atemoya Mabb.) grafted onto araticum-de-terra-fria [A. emarginata (Schltdl.) H. Rainer var. terra-fria]: ATF, araticummirim [A. emarginata (Schltdl.) H. Rainer var. mirim]: ATM, biribá [A. mucosa (Bail.) H. Rainer]: ATB, atemoya (autograft): ATA, and in ungrafted atemoya plants: CTR. Throughout the entire evaluation period, the net assimilation rate (A net) and stomatal conductance (g s) of CTR plants remained practically constant, being lower than those of grafted plants between 08:00 a.m. and 12:00 a.m., regardless of the rootstock used. Moreover, ATM plants proved to be more efficient in keeping the stomata open, even during the hottest hours of the day, improving A net and carboxylation use efficiency. However, this occurred at the lowest maximum carboxylation rate of ribulose-1,5-bisphosphate (V cmáx). Overall, ATF plants presented a low light saturation point and photosynthetic electron transport rates, though increased maximum quantum yield of photosynthesis was observed. Thus, we accept our hypothesis and conclude that grafting might affect the photosynthetic metabolism of the atemoya hybrid, regardless of the combination used, which promotes enhanced A net and low V cmáx and light saturation points.

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“…Santos et al (2005) reported a survival rate of 4% at 45 days after grafting sugar apple onto biribá; however, the physiological explanations that support the existence of negative reactions in the formation of callus or vascular systems are not presented. Scientific evidence indicates that atemoya grafted onto biribá has a proliferation of parenchyma and differentiation of the vascular system, which establishes connections between the scion and rootstock tissues (BARON et al, 2014). According to Kavati (2013), producers report incompatibility after years of commercial orchard formation.…”

Section: áCido Abscísico E Compatibilidade De Atemoia (Annona X Atemomentioning

confidence: 99%

Abscysic acid and compatibility of atemoya (Annona x atemoya Mabb.) grafted onto native species

2018

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Grafting is an effective technique used in the cultivation of commercial fruit species given the necessity to guarantee the genetic characteristics of productive species using selected clones. Although grafting is a common and widespread technique and phytohormones play a key role in the formation of tissues, the relationship between phytohormones, such as abscisic acid, and mechanisms of incompatibility is not yet well elucidated. Thus, the objective of this study was to establish whether a correlation exists between variations in abscisic acid and the compatibility of the atemoya (Annona x atemoya Mabb.) cultivar ‘Thompson’ grafted onto biribá [Annona mucosa (Bail.) H. Rainer], araticum-mirim [Annona emarginata (Schltdl.) H. Rainer ‘var. mirim’] and araticum-de-terra-fria [Annona emarginata (Schltdl.) H. Rainer ‘var. terra-fria’]. Plant cultivation was carried out at the Botany Department of Instituto de Biociências (IB), Unesp, Botucatu, São Paulo, Brazil. The plant material of grafted plants (stem above the grafted area, stem containing the grafted region, and stem below the grafted region) and ungrafted plants (stem 20 cm above ground) was collected 500 days after grafting (DAG) for the extraction and quantification of abscisic acid. The results of this study show that ungrafted Annona plants exhibit variations in the concentration of abscisic acid among the native rootstock species. When grafted, the most commonly used grafting combinations, araticum-de-terra-fria and araticum-mirim, present the same concentrations of abscisic acid in the graft region as self-grafted atemoya. It was concluded that the observed variations in the concentrations of abscisic acid in the graft region did not cause incompatibility in the combinations of atemoya grafted onto different native species.

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Gas exchanges in annonaceae species under different crop protections

Cited by 4 publications

References 19 publications

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

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

Leaf gas exchanges responses of atemoya scion grafted onto Annona rootstocks

Abscysic acid and compatibility of atemoya (Annona x atemoya Mabb.) grafted onto native species

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