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Sharp differentiation on the performance of plant functional groups across natural edges

Journal of Plant Ecology 2019年第1期12卷 186-198页

作者： Evelyn da Fonseca Alecrim Bragion Gabriela Aparecida Oliveira Coelho Flávia Freire de Siqueira maria uriarte Eduardo van den Berg Department of Forest Engineering Federal University of LavrasCampus UniversitárioCaixa Postal 3037CEP 37200-000LavrasMGBrazil Department of Ecology Evolution and Environmental BiologyColumbia UniversityNew YorkNYUSA

Aims Gallery forests within grasslands have natural edges with open envi-ronments and offer a unique opportunity to examine how species performances vary across environmental ***,we asked if demographic rates of tree functional groups varied along the edge,if we could explain differences in plant strategies and performance through functional traits and which traits increase growth and sur-vival in natural *** We examine mortality and recruitment within the first 10 m of nat-ural edges of eight gallery forests using demographic data from five annual *** defined a priori plant strategies using tree functional groups:light demanding,pioneer and shade *** Findings The shade-tolerant group had the lowest mortality rates and basal area(BA)loss,while pioneer and light-demanding species had similar behavior for these *** survival and growth of functional groups were affected differently by the distance from the *** pioneer group survived more near the edge,while light-demanding and shade-tolerant groups toward the forest *** groups had higher growth in the *** differences could be explained by functional traits since most species have an acquisition strategy:higher specific leaf area and growth,lower leaf dry matter con-tent,lighter stem density,deeper crowns and less slender *** traits enhanced ***,mortality selected both strategies,but in distinct edge’s *** study showed that the high diversity found in natural edges can be explained by a niche and functional perspective,where differences in functional traits lead to differential performance along the environmental gradient.

关键词： edges diversity gradient niche hypothesis SLA LDMC

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Solid State Bioconversion for Producing Common Bean(Phaseolus vulgaris L.)Functional Flour with High Antioxidant Activity and Antihypertensive Potential

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Food and Nutrition Sciences 2013年第4期4卷 480-490页

作者： maria Lilia Guzmán-uriarte Luis Martín Sánchez-Magaña Graciela Yaneth Angulo-Meza Edith Oliva Cuevas-Rodríguez Roberto Gutiérrez-Dorado Saraid Mora-Rochín Jorge Milán-Carrillo Angel Valdez-Ortiz Cuauhtémoc Reyes-Moreno Faculty of Chemical-Biological Sciences Autonomous University of SinaloaCuliacánMexico Northwest Regional Program for Doctorate in Biotechnology Autonomous University of SinaloaCuliacánMexico

The main objective of this investigation was to study the time effect during solid state bioconversion (SSB) on total phenolics content (TPC) and antioxidant activity (AoxA) of common beans to improve antihypertensive functionality. Cooked cotyledons of dehulled common beans were inoculated with a suspension of R. oligosporus NRRL 2710 (1 × 106 spores/mL), and incubated at 35℃ for times of 24, 36, 48, 60, 72, 84, 96 and 108 h (after 108 h the cotyledons showed off odor). Flours from bioprocessed dehulled common bean from each incubation time were blended with their corresponding milled seed coats. The best time for producing bioprocessed common bean (added with seed coats) functional flour with the highest AoxA (ORAC value = 17,468 μmol Trolox equivalents (TE)/100 gsample, dw;ABTS value = 13,505 μmol TE/100 gsample, dw) was 108 h. The SSB process substantially increased TPC and total hydrophilic AoxA and antihypertensive potential of common beans in 2.24, 2.45 - 2.73 and 6769 times, respectively. Proteins hydrolyzates from unprocessed whole and bioprocessed (108 h) common beans had IC50 [concentration needed to inhibit 50% the activity of angiotensin converting enzyme (ACE)] of 79.2 and 0.0117 μg/mL, respectively. The SSB is an efective strategy to improve the TPC of common beans for enhanced functionality with improved antioxidant activity and antihypertensive potential.

关键词： Solid State Bioconversion Common Bean Functional Flour Antioxidant Activity Antihypertensive Activity

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