Stomatal Frequency and Size in Leaves of Pejibaye (Bactris Gasipaes Kunth)

Tucci, M. L. S.; Bovi, Marilene Leão Alves; Spiering, Sandra Heiden; Machado, Samísia Maria Fernandes

doi:10.17660/actahortic.2000.516.17

Cited by 4 publications

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“…The results are consistent with Tucci et al (2000) who observed on peach palm leaves a frequency significant higher on leaflets abaxial surfaces. The later was higher on leaflets of plants from Plot 3, corresponding to 65.6 stomata mm -2 , what was 26% higher than 51.9 stomata mm -2 observed on leaflets from plants showing a severe chlorosis.…”

Section: Spad Readings and Stomata Countingsupporting

confidence: 93%

Gas exchanges in peach palms as a function of the spad chlorophyll meter readings

Tucci

Modolo

Erismann³

et al. 2011

Rev. Bras. Frutic.

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The close relationship between the chlorophyll-meters readings and the total chlorophyll and nitrogen contents in leaves, has allowed their evaluation both in annual and perennial species. Besides, some physiological events such as the CO2 assimilation have also been estimated by chlorophyll meters. This work was carried out aiming to evaluate the gas exchanges of peach palms as a function of the chlorophyll SPAD-Meter readings. Three year-old peach palms from Yurimaguas, Peru were studied in Ubatuba, SP, Brazil, spaced 2 x 1 m in area under a natural gradient of organic matter which allowed four plots to be considered, according to the peach palms leaves colors, from light yellow to dark green. The SPAD readings and the stomatal frequency of leaflets were evaluated. The photosynthetic photon flux density (PPFD, μmol m-2 s-1), the leaf temperature (Tleaf, ºC), the CO2 assimilation (A, μmol m-2 s-1), the stomatal conductance (g s, mol m-2 s-1), the transpiration (E, mmol m-2 s-1) and the intercellular CO2 concentration (Ci, μmol mol-1) were evaluated with a portable infrared gas analyzer (LCA-4, ADC BioScientific Ltd., Great Amwell, U.K.). A linear increase in the CO2 assimilation as a function of the SPAD readings (y = -0.34 + 0.19x, R² = 0.99), indicates that they can be a rapid and cheap complementary method to evaluate in peach palms some important physiological events, such as CO2 assimilation.

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Section: Spad Readings and Stomata Countingsupporting

confidence: 93%

Gas exchanges in peach palms as a function of the spad chlorophyll meter readings

Tucci

Modolo

Erismann³

et al. 2011

Rev. Bras. Frutic.

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“…Esta distribución diferencial de los estomas en ambas superficies foliares es muy común en las especies cultivadas (Tichá 1982). El pejibaye es una especie anfiestomá-tica, como mencionado por Tucci et al (2000). La frecuencia promedio de estomas en la superficie abaxial fue similar al observado por estos autores (101.35.mm -2 ), cuyas plantas crecieron en condiciones climáticas distintas al del presente trabajo (temperatura promedio anual de 22.4 o C, temperatura máxima absoluta promedio de 37.6 o C, precipitación anual de 1430 mm y HR promedio de 47.6 a 72.2%) (FEGRI/ UNICAMP, 2005).…”

Section: Discussionunclassified

“…Otros autores han informado de una frecuencia estomática en la superficie abaxial mucho menores a las que se observaron en esta investigación, en plantas cultivadas para palmito en Ubatuba, Brasil, en condiciones tropicales de alta temperatura y humedad, similares a las que prevalecieron en Guápiles, durante la ejecución de este trabajo. Tucci et al (2000) y Bovi et al (2002) también encontraron una frecuencia estomá-tica, en la superficie adaxial, inferior (7,16 y 6,10 estomas.mm -2 respectivamente) a los valores nuestros. Evidentemente, la frecuencia estomática resulta altamente variable con las condiciones de clima y las prácticas culturales, no solamente en pejibaye, sino en otras palmas como la palma aceitera, donde se han encontrado variaciones cercanas al 90% en la frecuencia de estomas en la superficie abaxial de los foliolos (Zobel y Liu 1980).…”

Section: Discussionunclassified

“…La incidencia de algunas enfermedades también puede influir en la densidad estomá-tica por causar alteraciones en el equilibrio hídrico de la planta (Tucci et al 2000), e interferir en la expansión de la lámina foliar. Mathew (1981) observó en Cocos nucifera una mayor frecuencia estomática en hojas de plantas enfermas (228.mm -2 ) comparado con la frecuencia estomática de hojas de plantas sanas (182 mm -2 ).…”

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“…La información sobre las características y la frecuencia de estomas en esta especie es escasa (Tucci et al 2000. Tampoco existe información de la anatomía micrográfica de los foliolos de pejibaye y eventualmente se hace referencia a esta especie, igual que a Elaeis guineensis, como especies C 4 , por su alta productividad.…”

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Anatomía micrográfica del folíolo de la palma neotropical Bactris gasipaes (Arecaceae)

Chaimsohn¹,

Montiel²,

Villalobos³

et al. 2007

RBT

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Diurnal and seasonal variation in photosynthesis of peach palms grown under subtropical conditions

Tucci¹,

Erismann²,

Machado³

et al. 2010

Photosynt.

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The Amazonian peach palm (Bactris gasipaes Kunth) has been grown for heart-of-palm production under subtropical conditions. As we did not see any substantial study on its photosynthesis under Amazonian or subtropical conditions, we carried out an investigation on the diurnal and seasonal variations in photosynthesis of peach palms until the first heartof-palm harvest, considering their relationship with key environmental factors. Spineless peach palms were grown in 80-L plastic pots, under irrigation. Gas exchange and chlorophyll fluorescence emission measurements were taken in late winter, mid spring, mid summer and early autumn, from 7:00 to 18:00 h, with an additional chlorophyll fluorescence measurement at 6:00 h. The highest net CO 2 assimilation (P N ), observed in mid summer, reached about 15 μmol m -2 s -1 , which was about 20% higher than the maximum values found in autumn and spring, and 60% higher than that in winter The same pattern of diurnal course for P N was observed in all seasons, showing higher values from 8:00 to 9:00 h and declining gradually from 11:00 h toward late afternoon. The diurnal course of stomatal conductance (g s ) followed the same pattern of P N , with the highest value of 0.6 mol m -2 s -1 being observed in February and the lowest one (0.23 mol m -2 s -1 ) in September. The maximal quantum yield of photosystem II (F v /F m ) was above 0.75 in the early morning in all the months. The reversible decrease was observed around midday in September and October, suggesting the occurrence of dynamic photoinhibition. A significant negative correlation between the leaf-air vapour pressure difference (VPD leaf-air ) and P N and a positive correlation between P N and g s were observed. The photosynthesis of peach palm was likely modulated mainly by the stomatal control that was quite sensible to atmospheric environmental conditions. Under subtropical conditions, air temperature (T air ) and VPD leaf-air impose more significant effects over P N of peach palm than an excessive photosynthetic photon flux density (PPFD). The occurrence of dynamic photoinhibition indicates that under irrigation, peach palms appeared to be acclimated to the full-sunlight conditions under which they have been grown.

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Stomatal Frequency and Size in Leaves of Pejibaye (Bactris Gasipaes Kunth)

Cited by 4 publications

References 0 publications

Gas exchanges in peach palms as a function of the spad chlorophyll meter readings

Gas exchanges in peach palms as a function of the spad chlorophyll meter readings

Anatomía micrográfica del folíolo de la palma neotropical Bactris gasipaes (Arecaceae)

Diurnal and seasonal variation in photosynthesis of peach palms grown under subtropical conditions

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