Diurnal and seasonal patterns of leaf gas exchange in bahiagrass (<i>Paspalum notatum</i> Flügge) growing in a subtropical climate

Ribeiro, Rafael Vasconcelos; Lyra, Guilherme Bastos; Santiago, Alailson Venceslau; Pereira, Alfredo; Machado, Eduardo Caruso; Oliveira, Ricardo Ferraz de

doi:10.1111/j.1365-2494.2006.00533.x

Cited by 10 publications

(6 citation statements)

References 23 publications

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“…In contrast, the higher the concentration of glucose (probably as a consequence of starch hydrolysis), more intense was the vegetative growth and phytomass production by M. minutiflora in the external transect. Similar behaviour was reported for the tropical grass species Paspalum notatum which showed a reduced growth rate during dry months, followed by a reduction in biomass production, when growing in a subtropical climate (Ribeiro et al, 2006).…”

Section: Discussionsupporting

confidence: 56%

Seasonal variation of soluble carbohydrates and starch in Echinolaena inflexa, a native grass species from the Brazilian savanna, and in the invasive grass Melinis minutiflora

et al. 2010

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Echinolaena inflexa (Poir.) Chase is an abundant C3 grass species with high biomass production in the Brazilian savanna (cerrado); Melinis minutiflora Beauv. is an African C4 forage grass widespread in cerrado and probably displacing some native herbaceous species. In the present work, we analysed seasonally the content and composition of soluble carbohydrates, the starch amounts and the above-ground biomass (phytomass) of E. inflexa and M. minutiflora plants harvested in two transects at 5 and 130 m from the border in a restrict area of cerrado at the Biological Reserve and Experimental Station of Mogi-Guaçu (SP, Brazil). Results showed that water soluble carbohydrates and starch amounts from the shoots of both species varied according to the time of the year, whilst in the underground organs, variations were observed mainly in relation to the transects. Marked differences in the pattern of the above-ground biomass production between these two grasses relative to their location in the Reserve were also observed, with two peaks of the invasive species (July and January) at the Reserve border. The differences in carbohydrate accumulation, partitioning and composition of individual sugars concerning time of the year and location in the Reserve were more related to the annual growth cycle of both grasses and possibly to specific physiological responses of M. minutiflora to disturbed environments in the Reserve border.Keywords: biological invasion, cerrado, starch, sugars, tropical grasses. Variações sazonais de carboidratos solúveis e amido em Echinolaena inflexa, uma espécie nativa do cerrado, e na gramínea invasora Melinis minutiflora ResumoEchinolaena inflexa (Poir.) Chase é uma gramínea C3 muito abundante em áreas de cerrado e com alta produção de biomassa. Melinis minutiflora Beauv. é uma gramínea C4 de origem africana introduzida no Brasil para fins forrageiros, que se espalhou amplamente por áreas de cerrado, provavelmente deslocando espécies nativas. No presente trabalho, o conteúdo e a composição de carboidratos solúveis, o teor de amido e a biomassa aérea foram analisados sazonalmente em plantas de E. inflexa e M. minutiflora coletadas em dois transectos, a 5 e 130 m da borda da Reserva Biológica e Estação Experimental de Mogi-Guaçu, uma área restrita de cerrado (SP, Brasil). Os resultados mostraram que os carboidratos solúveis e o conteúdo de amido da parte aérea de ambas as espécies variaram de acordo com a época do ano, enquanto que nos órgãos subterrâneos as variações foram observadas principalmente em relação aos transectos. Diferenças marcantes no padrão de distribuição de biomassa aérea das duas espécies em relação à localização na reserva também foram observadas, com dois picos de produção da espécie invasora (em julho e janeiro) na borda da reserva. As diferenças observadas no acúmulo de carboidratos, partição e composição dos açúcares em relação à época do ano e localização na reserva foram mais relacionadas ao ciclo anual de crescimento de ambas as espécies e possivelmente a respostas f...

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Section: Discussionsupporting

confidence: 56%

Seasonal variation of soluble carbohydrates and starch in Echinolaena inflexa, a native grass species from the Brazilian savanna, and in the invasive grass Melinis minutiflora

et al. 2010

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“…by Ribeiro [26]. This results showing these introduced grass accessions presented a satisfied productivity capacity.…”

Section: Discussionsupporting

confidence: 54%

Productivity and the Survival Rate after Winter Management of Seven Tropical Forage Accessions in Subtropical Region of China

He¹,

Mo²,

Huang³

et al. 2017

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Forage production and quality of five tropical grass accessions (Guimu-1 hybrid elephant grass (PG1), Mulato II (M II), Ubon paspalum (PU), hybrid elephant grass (PH) and Reyan 11 paspalum (PR11)) and two tropical legume accessions (Reyan 5 stylo (SR5) and Ubon stylo (SU)) were evaluated in a field experiment in a subtropical area with hot summers and cold winters in Guangxi, China. Three forage stubble cover managements: no cover (CK), dry mass cover (MC) and plastic cover (PC) were applied at the end of the summer period to evaluate cold tolerance and accession survival over the winter. Photosynthesis measurements were taken from the forages in mid-summer. The results showed that PG1 accession produced significantly higher dry matter yields (67.0 t·ha −1 ) than the other grass and legume accessions. Legume accessions SU and SR5 produced much less dry matter (6.4 -7.2 t·ha −1 ) compared to the grasses. M II, PU and PR11 contained the largest proportion of leaf. PG1 and PH showed good cold tolerance (survival rate >85%) under −1˚C conditions without any cover management. PR11 had better cold tolerance than PU. M II exhibited very poor winter survival under no cover and with massive cover, and only survived well under plastic cover. The two stylo accessions died completely under all winter cover management treatments. In the growing season, under a given photosynthesis photon flux density (PPFD) = 1500 μmol m . Though these 7 tropical accessions yielded high production in the grow season, stylo and M II are sensitive to cold in subtropical region of Guangxi. The result suggests that PG1 and PU are good accessions and can be used as productive perennial pasture, while stylo and M II are How to cite this paper:

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“…In contrast, during winter (driest season), the aerial biomass was reduced but the relative starch content increased (Souza et al ., ). This tendency was also observed for Paspalum notatum , another species growing in tropical and subtropical climate (Ribeiro et al ., ).…”

Section: Discussionmentioning

confidence: 97%

Diversity of non‐structural carbohydrates in grasses (Poaceae) from Brazil

Moraes

Chatterton

Harrison

et al. 2012

Grass and Forage Science

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Non‐structural carbohydrates (NSC) are the primary energy available for growth and dry‐mass production in forage grasses. They are also associated with tolerance to environmental stresses, including drought. Soluble carbohydrates, especially fructans of temperate forage grasses, have been extensively studied; however, little is known about NSC of tropical grasses. These plants are abundant in the Cerrado, a savanna‐like vegetation with a definite seasonality in rainfall distribution. Such an environment presents an ideal condition for the occurrence of fructans. However, the present analysis of carbohydrates in aerial parts of twenty‐four tropical grass species, mainly from the Panicoideae subfamily in the Cerrado, shows a distinctively different NSC profile when compared with temperate grasses. Free glucose and starch are common NSC found in most plant organs. However, free fructose and sucrose‐based oligosaccharides were only found in very low amounts. Sucrose was detected in higher amounts only in stems. A linear series of malto‐oligosaccharides was found in leaf blades, sheaths and stems of most of the Cerrado grasses, except for those from the Andropogoneae tribe. These results indicate a diversity of regulatory pathways of NSC metabolism in tropical forage grasses from the Cerrado.

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Diurnal and seasonal patterns of leaf gas exchange in bahiagrass (Paspalum notatum Flügge) growing in a subtropical climate

Abstract: The objective of this study was to evaluate the seasonal and diurnal changes in leaf gas exchange in bahiagrass (Paspalum notatum) plants grown in an irrigated lawn.

Cited by 10 publications

References 23 publications

Seasonal variation of soluble carbohydrates and starch in Echinolaena inflexa, a native grass species from the Brazilian savanna, and in the invasive grass Melinis minutiflora

Seasonal variation of soluble carbohydrates and starch in Echinolaena inflexa, a native grass species from the Brazilian savanna, and in the invasive grass Melinis minutiflora

Productivity and the Survival Rate after Winter Management of Seven Tropical Forage Accessions in Subtropical Region of China

Diversity of non‐structural carbohydrates in grasses (Poaceae) from Brazil

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