Ecophysiology of tropical tree crops: an introduction

DaMatta, Fábio M.

doi:10.1590/s1677-04202007000400001

Cited by 21 publications

(19 citation statements)

References 10 publications

(11 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The yield in the first cycle was higher, 25.4 and 21.3 t.ha -1 , respectively. For DaMatta (2007), the reduction of production is associated with a decline in photosynthetic rates induced by low water availability in the soil, either by a direct effect of dehydration in the photosynthetic apparatus or by an indirect effect through stomatal closure, which restricts the absorption of CO 2 . Santos et al (2013) evaluated 'Tommy Atkins' mangos under different irrigation regimes in the same region of this study and concluded that the gas exchange influenced the growth, development and production and they were related to water conditions of the plant, depending on the soil water status and weather conditions.…”

Section: Resultsmentioning

confidence: 99%

Gas Exchange in Different Varieties of Banana Prata in Semi-Arid Environment

et al. 2016

View full text Add to dashboard Cite

-This study aimed to evaluate gas exchange of banana prata in two production cycles in semiarid environment. Six cultivars were used as treatments arranged into a completely randomized design with five replications and four plants per plot. For physiological characteristics, it was considered a factorial arrangement of 6x14x2, six cultivars, 14 periods (months), two readings, 8h and 14h in each period. The rates of gas exchange, the carboxylation efficiency and the instantaneous efficiency of water use were higher at 8h and lower at 14h, with rare exceptions. The 'BRS platina' had a higher leaf temperature, higher transpiration and lower water use efficiency. 'Prata-Anã', 'FHIA-18' and 'Maravilha' expressed lower leaf temperature and lower transpiration. The 'Maravilha' is the most efficient in water use. Transpiration increases linearly with the leaf temperature, while the instantaneous efficiency of water use decreases linearly. Index terms: Musa spp., AAB and AAAB, physiological variables. TROCAS GASOSAS EM DIFERENTES CULTIVARES DE BANANEIRAS TIPO PRATA EM AMBIENTE SEMIÁRIDORESUMO -Objetivou-se com o presente trabalho avaliar as trocas gasosas de bananeiras tipo prata, em dois ciclos de produção em ambiente semiárido. Utilizaram-se seis cultivares como tratamentos dispostos em um delineamento experimental inteiramente casualizado, com cinco repetições e quatro plantas úteis por parcela. Para as características fisiológicas, considerou-se um arranjo em esquema fatorial 6x14x2, seis cultivares, 14 épocas de avaliação (meses) e dois horários de leitura (8h e 14h), em cada época. As taxas de trocas gasosas, a eficiência de carboxilação e a eficiência instantânea do uso da água foram maiores às 8h e menores às 14h, com raras exceções. A 'BRS platina' apresentou maior temperatura foliar, maior transpiração e menor eficiência de uso da água. 'Prata-Anã', 'FHIA-18' e 'Maravilha' expressaram menor temperatura foliar e menor transpiração. A 'Maravilha' é mais eficiente no uso da água. A transpiração aumenta de maneira linear com o aumento da temperatura foliar, enquanto a eficiência instantânea do uso da água decresce linearmente. Termos para indexação: Musa spp., AAB e AAAB, variáveis fisiológicas.

show abstract

Section: Resultsmentioning

confidence: 99%

Gas Exchange in Different Varieties of Banana Prata in Semi-Arid Environment

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Only a few tropical tree crops of economic importance have received a certain level of basic research regarding environmental physiology (DAMATTA, 2007). Several gaps exist in the database concerning the ecophysiology of tropical tree crops (MIRANDA et al, 2008;OKUMURA et al, 2008), mainly when considering environmental factors, such as water availability and temperature (DAMATTA, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…Several gaps exist in the database concerning the ecophysiology of tropical tree crops (MIRANDA et al, 2008;OKUMURA et al, 2008), mainly when considering environmental factors, such as water availability and temperature (DAMATTA, 2007).…”

Section: Introductionmentioning

confidence: 99%

Tolerance to water deficit in young trees of jackfruit and sugar apple

Rodrigues¹,

Souza²,

Nogueira³

et al. 2010

Rev. Ciênc. Agron.

View full text Add to dashboard Cite

-The predawn leaf water potential (Ψ l ), stomatal conductance (g s ), CO 2 assimilation (A), transpiration (E), chlorophyll a fluorescence and leaf metabolite contents (soluble sugars, proteins and free amino acids) of two tropical fruit species grown in a greenhouse were evaluated to determine the effect of induced water stress on young plants. Six month-old jackfruit (Artocarpus heterophyllus Lam.) and sugar apple (Annona squamosa L.) plants were evaluated in 10.0 L pots after eight days of water withholding, imposed by suspension of irrigation. Jackfruit water status was better than sugar apple. Sugar apple plants showed different daily stomatal behavior when well hydrated, compared to jackfruit plants under the same conditions. The gas exchange of both species showed sensibility to high vapor pressure deficit (VPD). However, under water deficit, photochemical efficiency dropped at midday in both treatments (control and water deficit) and both species showed low tolerance to high VPD and light intensity under greenhouse conditions. In contrast, some chlorophyll fluorescence variables showed good photosystem II stability at highest VPD hour (14:00 h). The present results involving carbohydrate metabolic changes revealed an accumulation of soluble sugars; moreover, protein and free amino acid contents in water stressed leaves also increased. These findings suggest an absence of damage to photosynthetic machinery for water deficit period. Jackfruit revealed greater tolerance to water deficit than sugar apple an important feature for commercial crops in northeastern Brazil. Key words -Annona squamosa. Artocarpus heterophyllus. Semi-arid. Tropical fruit. Water relations.Resumo -A condutância estomática (g s ), a assimilação de CO 2 (A), a transpiração (E), a fluorescência da clorofila e o conteúdo foliar de (açúcares solúveis, proteínas e aminoácidos livres) de duas espécies frutíferas tropicais foram avaliados para determinar o efeito do déficit hídrico induzido sobre as plantas da jaqueira (Artocarpus heterophyllus Lam.) e da pinheira (Annona squamosa L.) de seis meses de idade foram cultivadas em potes com capacidade para 10,0 L e foram avaliadas após oito dias de suspensão da irrigação. A jaqueira quando bem hidratada, foi melhor do que a pinheira. Plantas de pinheira apresentaram comportamento diferente quanto à condutância estomática diária quando comparada com as plantas de jaqueira, ambas bem hidratadas. As trocas gasosas de ambas as espécies apresentaram alta sensibilidade ao déficit pressão de vapor (DPV). No entanto, sob déficit hídrico, a eficiência fotoquímica decresceu ao meio-dia em ambos os tratamentos (controle e déficit hídrico) e ambas as espécies apresentaram baixa tolerância ao alto DPV e intensidade da luz em casa de vegetação. Em contrapartida, algumas variáveis de fluorescência de clorofila mostraram boa estabilidade na hora de maior DPV (14:00 h), indicando estabilidade do fotossistema II. Os resultados envolvendo alterações metabólicas revelaram um acúmulo de açúcares solúveis, ...

show abstract

“…Damage caused by water stress varies according to the duration, intensity, frequency, and time of occurrence in the culture. The frequency and intensity of water deficit are the main limiting factors in global agricultural production (Santos and Carlesso, 1998;Damatta, 2007). Water stress is a situation common to many cultures, influencing almost every aspect related to plant development (Damatta, 2007).…”

Section: The Phenological Stages Of Wheatmentioning

confidence: 99%

Wheat phenology and yield under drought: A review

Sarto¹,

Sarto²,

Rampim³

et al. 2017

Aust J Crop Sci

View full text Add to dashboard Cite

The purpose of this review was to characterize the wheat crop phenology under drought conditions, at different stages of crop growth. Effects of drought on wheat plants are variable, and depend on the phenological stage of the plant as well as the duration, intensity and frequency of the drought. The crop evapotranspiration increases over the course of the phenological cycle, reaching a maximum in the growth stage (from the beginning of heading until the end of flowering), which is the most sensitive stage of the crop to drought. At ripening, the evapotranspiration decreases to save and allocate the energy to grain yield. The drought affects the plant density in the initial phase, tiller number per plant in the tillering phase, and plant height in the stretching phase, most severely. At the flowering stage, the processes related to fertilization and fixation of grain are most severely affected, i.e., the number of viable seeds per area decreases. In the grain formation stage, the ability of the source (leaf) to use and translocate the assimilates to the grain is most severely affected, thus affecting the grain weight.

show abstract

Ecophysiology of tropical tree crops: an introduction

Cited by 21 publications

References 10 publications

Gas Exchange in Different Varieties of Banana Prata in Semi-Arid Environment

Gas Exchange in Different Varieties of Banana Prata in Semi-Arid Environment

Tolerance to water deficit in young trees of jackfruit and sugar apple

Wheat phenology and yield under drought: A review

Contact Info

Product

Resources

About