Crescimento de plantas jovens de Nim-Indiano (Azadirachta indica a. juss. - Meliaceae) sob diferentes regimes hídricos

Martins, Marcus Vinícius Dantas de Campos; Nogueira, Rejane Jurema Mansur Custódio; Neto, André Dias de Azevedo; Santos, Mariana

doi:10.1590/s0100-67622010000500002

Cited by 22 publications

(28 citation statements)

References 18 publications

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“…Therefore, the difficulty of "Ora-pro-nobis" plants to absorb water from the substrate increased gradually with each unit of matric potential reduction, resulting in signs of water deficit stress such as reduced growth. Similar results were obtained in many experiments, with forestry species, flowers and cactus (Figueirôa et al 2004, Snyman 2004, Álvarez et al 2009, Silva et al 2010, Martins et al 2010.…”

Section: Resultssupporting

confidence: 85%

“…Plants subjected to water deficit usually have significant mass reduction, as observed in Myracrodruon urundeuva (Figueirôa et al 2004), Azadirachta indica (Martins et al 2010), Erythrina velutina (Silva et al 2010) and Opuntia cactus (Snyman 2004). Drought also causes higher allocation of photosynthates to roots than shoots (Kozlovski & Pallardy 2002, Silva & Nogueira 2003, stomatal closure, leaf growth inhibition, osmostic adjustment (Chaves et al 2002, Silva et al 2009 and changes in tissue elasticity (Kozlovski & Pallardy 2002, Tardieu et al 2011.…”

Section: Key-wordsmentioning

confidence: 99%

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Growing Pereskia aculeata under intermittent irrigation according to levels of matric potential reduction

Queiroz

Andrade

Morais

et al. 2015

Pesqui. Agropecu. Trop.

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Pereskia aculeata Mill., popularly known in Brazil as “Ora-pro-nobis”, is an unconventional edible vegetable. Taking into account its potential for agronomic cultivation, this study aimed to evaluate the growth response of this plant under intermittent drought through controlled reductions in the substrate matric potential, in a greenhouse. Treatments consisted of adding to the pots a volume of water to raise the matric potential to -5 kPa, according to the water retention curve in the substrate, whenever the mean substrate matric potential reached values between -10 kPa and -70 kPa, depending on the treatment. At 140 days after transplanting, leaf area and dry mass of leaves, stems and roots were determined. The intermittent reduction of the matric potential in the root zone of “Ora-pro-nobis” affected less the dry mass accumulation in leaves (reduction of 21.4%) than in stems (reduction of 48.1%) and roots (reduction of 63.7%), and that is interesting because leaves are the main commercial product of this plant. The treatment also modified the proportionality of dry mass allocation among plant parts and reduced the photosynthetic efficiency of leaves, fact evidenced by the linear increase of the specific leaf area (0.63 cm2 g-1kPa-1) and leaf area ratio (0.39 cm-2 g-1kPa-1), although not affecting directly the leaf area.

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Section: Resultssupporting

confidence: 85%

Section: Key-wordsmentioning

confidence: 99%

Growing Pereskia aculeata under intermittent irrigation according to levels of matric potential reduction

Queiroz

Andrade

Morais

et al. 2015

Pesqui. Agropecu. Trop.

View full text Add to dashboard Cite

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“…Similar results were found by Nascimento et al (2011), who studied different irrigation levels in seedlings of Hymenaea courbaril, and noticed that plants subjected to higher water availability were higher. Similarly, studies conducted by Martins et al, (2010), who studied the growth of young plants of nim-indiano (Azadirachta indica A. Juss). Figure 1C shows that there was a reduction of about 2 cm in the SD of the plants with total replacement of evapotranspiration in relation to those with only 20%; on the other hand, for treatments with 40 to 80% of replacement, variation is lower than 1%.…”

Section: Resultsmentioning

confidence: 99%

“…In tissues, it causes an excessive evapotranspirative demand or can limit water supply, so, it compromises various parts of the plant and can even drive some species to extinction (MARTINS et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Efeito responsivo de mudas de paricá ao estresse hídrico

Duarte¹,

Rocha²,

Lima³

et al. 2016

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The present study objective was identifying mechanisms of response to water deficit of paricá seedlings. The experiment was conducted in a greenhouse, in 8-liter pots, with substrate consisting of soil (dystrophic RedYellow Latosol), in randomized block design, with five different irrigations based on the evapotranspiration of the plants (20, 40, 60, 80 and 100%), with six replications. The plants were irrigated daily, with a water volume corresponding to 100% of the evapotranspired water, and, at 90 days after germination, subjected to ten days of water deficit, after that irrigated during ten days with the different percentages of evapotranspiration, then evaluated. The following variables were measured: number of leaves (NL), plant height (PH), stem diameter (SD), total biomass (TB), total daily transpiration (TDT), total chlorophyll (TC), carotenoids (CAR), root mass ratio (RMR), leaf mass ratio (LMR) stem mass ratio (SMR). Concluded that paricá seedlings response to water deficit with slowing down of dehydration, with reduction of content of carotenoids and increase in root volume. As a consequence of water stress, they reduce the number of leaves, stem diameter, plant height, and, of course, total biomass, aiming at maintaining the internal water, indicating low ability to tolerate stress.

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“…Lowest water availability leads to decreased cell expansion, caused by dehydration of the protoplast, and increased concentration of the solutes (MARTINS et al, 2010). As a consequence of dehydration, morphological, physiological and metabolic modifications are observed through the whole plant, which affect the production and translocation of photoassimilates to the new growth areas (SAPETA et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

SUBSTRATES AND WATER AVAILABILITY ON THE EMERGENCE AND INITIAL GROWTH OF Alibertia sessilis Schum. SEEDLINGS

Mota

Scalon

Heinz

et al. 2017

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The cultivation of native species in the Cerrado has encountered various problems, for instance, the slow growth and the lack of knowledge about the cultivation practices. In order to better use the available water resources and to produce quality seedlings, this study aimed to evaluate different substrates and water levels on the emergence and initial growth of Alibertia sessilis Schum. seedlings. The effects of the following substrates were evaluated: dystroferric Red Latosol (Oxisol), Oxisol +sand (1:1 v/v), Oxisol + sand + semidecomposed poultry litter (1:1:0.5 v/v), Oxisol + sand 2 + semi-decomposed poultry litter (1:2:0.5 v/v) and Oxisol + commercial-substrate-CS (1:1 v/v) associated with the levels of irrigation of 25, 50, 75 and 100% of the water holding capacity in the substrate (WHC). The best results for emergence percentage, initial growth and quality of seedlings were observed in the substrates Oxisol + sand 2 + poultry litter (1:2:0,5) at 100% of WHC. There was no emergence at 25% of WHC. Keywords: Rubiaceae; marmelinho; fruit of the Cerrado . Resumo Substratos e disponibilidade hídrica na emergência e crescimento inicial de mudas de Alibertia sessilisSchum. O cultivo de espécies nativas no Cerrado tem esbarrado em vários problemas, entre eles, o crescimento lento e a carência de conhecimentos sobre as práticas culturais. A fim de melhor utilizar os recursos hídricos disponíveis e produzir mudas de qualidade, objetivou-se no presente trabalho avaliar diferentes substratos e níveis de água na emergência e no crescimento inicial das mudas Alibertia sessilis Schum. Foram avaliados os efeitos dos substratos Latossolo Vermelho distroférrico (LVd), LVd +areia (1:1 v/v), LVd + areia + cama de frango semidecomposta (1:1:0,5 v/v), LVd + areia 2 + cama de frango semidecomposta (1:2:0,5 v/v) e LVd + substrato comercial -SC (1:1 v/v) associados aos níveis de irrigação de 25, 50, 75 e 100% da capacidade de retenção de água no substrato (CRA). Os melhores resultados para porcentagem de emergência, crescimento inicial e qualidade das mudas foram observados nos substratos LVd + areia 2 + cama de frango (1:2:0,5) a 100% da CRA. Não houve emergência a 25% da CRA. Palavras-chave: Rubiaceae; marmelinho; frutífera do Cerrado.

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Crescimento de plantas jovens de Nim-Indiano (Azadirachta indica a. juss. - Meliaceae) sob diferentes regimes hídricos

Cited by 22 publications

References 18 publications

Growing Pereskia aculeata under intermittent irrigation according to levels of matric potential reduction

Growing Pereskia aculeata under intermittent irrigation according to levels of matric potential reduction

Efeito responsivo de mudas de paricá ao estresse hídrico

SUBSTRATES AND WATER AVAILABILITY ON THE EMERGENCE AND INITIAL GROWTH OF Alibertia sessilis Schum. SEEDLINGS

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