Development of anatomical structure of roots of <i>Phragmites australis</i>

Soukup, Aleš; Votrubová, Olga; Čı́žková, Hana

doi:10.1046/j.0028-646x.2001.00317.x

Cited by 80 publications

(70 citation statements)

References 46 publications

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“…The presence of a thick barrier in cell walls, by the deposition of suberin, prevents the radial loss of oxygen to the rhizosphere while increasing its longitudinal diffusion in the aerenchyma (Colmer 2003). However, this barrier can decrease the effect of ethylene and methane and the entrance of water and nutrients (Soukup et al 2002). Thus, thin exodermis allows free radial movement of oxygen and creates aerated conditions in the rhizosphere, protecting the roots against phytotoxins (Armostrong et al 2000;Soukup et al 2002).…”

Section: Discussionmentioning

confidence: 99%

Morpho-anatomical characteristics conferring drought tolerance in roots of sugar cane genotypes (Saccharum L., Poaceae)

Maciel

Oliveira

Fadin³

et al. 2015

Braz. J. Bot

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Sugar cane is a major product of Brazilian agriculture, providing about R$ 56 billion of exports per year. Morphological and anatomical analyses enable the identification of plants, whose genotype is still unknown, and increase our knowledge of organs adaptations, such as roots, to different environment conditions. This study aimed to describe the morpho-anatomy of roots of six sugar cane genotypes. Plants were obtained by insertion of stalks in 3L containers filled with coconut fiber substrate. They were held for 7 days in a germination chamber (BOD MA 403) under a 16-h photoperiod with a light intensity of 38 lmol m -2 s -1 and a constant temperature of 35°C. Daily irrigation was performed, keeping the substrate close to saturation. After this period, plants were transferred to a greenhouse and grew under approximately 116 lmol m -2 s -1 of light intensity at 30°C and 80 % relative humidity, during 45 days of daily irrigation. For anatomical characterization, 20 roots from stalks and tillers of five plants per genotype were fixed in FAA 50 % and preserved in alcohol 70 %. For each root, the median region was selected for freehand-sectioning, using a razor blade. The results confirmed that anatomical features might be useful for cultivar identification. RB867515 cultivar showed roots with anatomical features that provide drought resistance, including a reduced number of cortical layers. The roots of SP801816 cultivar had more cortical layers and protoxylem poles in stalks and tillers, indicating a reduced drought resistance.

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Section: Discussionmentioning

confidence: 99%

Morpho-anatomical characteristics conferring drought tolerance in roots of sugar cane genotypes (Saccharum L., Poaceae)

Maciel

Oliveira

Fadin³

et al. 2015

Braz. J. Bot

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“…Saracura maize helps avoid the radial loss of oxygen to the rhizosphere and increases the longitudinal diffusion in the aerenchyma (Colmer 2003b), since this tissue is not highly specialized in these genotypes. Furthermore, these suberized layers help avoid partial absorption of phytotoxins (Soukup et al 2002). However, there are negative consequences regarding the presence of this barrier, as it can diminish the release of ethylene and methane present in excess and decrease the intake of water and nutrients.…”

Section: Resultsmentioning

confidence: 99%

Morpho-anatomical characterization of root in recurrent selection cycles for flood tolerance of maize (Zea mays L.)

Souza¹,

Castro²,

Pereira³

et al. 2009

PLANT SOIL ENVIRON

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Changes in root anatomical structures at successive cycles of selection (cycle 1 to cycle 18, alternating) were observed in the study of maize (Zea mays L. cv. Saracura-BRS 4154) capable to survive and produce in temporarily flooded soils; this cultivars was developed by the Maize and Sorghum National Research Center through stratified phenotypic recurrent selection for cultivation wetland soils. Field trial was carried out and flooding of the soil was initiated at the six-leaf stage; the soil was flooded with water (20-cm deep) three times per week. Root sample was collected, fixed, and selected for observation in photon microscope. A gradual increase in the number of aerenchyma, the proportion of vascular cylinder, smaller metaxylem, and phloem and epidermis width, and a decrease in exodermis and cortex were observed in successive selection cycles. Such phenotypic changes impart the flood tolerance ability to this maize cultivar.

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“…In a mechanical stress manipulation experiment, P. australis withstood the stress better than other helophyte stands because of its lower susceptibility to breaking and higher bending stiffness (Coops and Velde 1996). P. australis is also resistant to flooding events because of the early differentiation of the exodermis in its roots (Soukup et al 2002). Thus, the physical traits of P. australis are probably the main cause for its coverage increase, by reducing its susceptibility to mechanical stress during the monsoon season.…”

Section: Changes In Dune Plant Coverage Over the Monsoon Seasonmentioning

confidence: 98%

Effects of Monsoon on Topography, Soil Variables, and Coastal Plants

Kim

et al. 2014

Estuaries and Coasts

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Coastal dunes are highly vulnerable to disturbances. We characterized changes in the plant distribution, soil properties, and topology of a coastal dune field during the monsoon period. We selected a 600×300 m rectangular area of Dadaepo in the Nakdong River estuary and measured variables at 40 sampling points. A field survey was performed over two periods (pre-and post-monsoon) in 2009. Soil, topological features, and vegetation were surveyed at each point, and canonical correspondence analysis was used to identify relationships among the variables during the monsoon. The volumetric net change in the study site was 33,104 m 3 during the monsoon. When topographic and edaphic variables were compared, topological variables were found to be the dominant factors in dune vegetation zonation; however, their influence on vegetation change during the monsoon was less prominent than that of edaphic variables. Inland exotic species (Oenothera odorata and Conyza canadensis) and Cynodon dactylon replaced most of the Carex pumila distribution (54 % decrease) after the monsoon. Phragmites australis expanded its distribution and replaced the adjacent community after the monsoon. The area of Suaeda japonica decreased by more than 85 %, and this area was also replaced by P. australis. This knowledge of the dynamics of dune vegetation and environmental variables will be important for predicting the impacts of climate change, such as sea level rise and increased rainfall frequency.

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Development of anatomical structure of roots of Phragmites australis

Cited by 80 publications

References 46 publications

Morpho-anatomical characteristics conferring drought tolerance in roots of sugar cane genotypes (Saccharum L., Poaceae)

Morpho-anatomical characteristics conferring drought tolerance in roots of sugar cane genotypes (Saccharum L., Poaceae)

Morpho-anatomical characterization of root in recurrent selection cycles for flood tolerance of maize (Zea mays L.)

Effects of Monsoon on Topography, Soil Variables, and Coastal Plants

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