Curling and folding of leaves of monocotyledons — a strategy for structural stiffness

King, M. J.; Vincent, Julian F. V.; Harris, W.

doi:10.1080/0028825x.1996.10410704

Cited by 31 publications

(25 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In recent years, V-shaped, or rolled, leaves were regarded as an important element of the ideal rice plant type (Chen et al 2001). The distinctive shape makes leaves stiVer along the longitudinal axis, thus providing additional support and decreasing droopiness (King et al 1996). Based upon two near isogenic lines (NILs) of the same rice variety with rolledleaf or Xat-leaf characteristics, researchers found that canopy photosynthetic rate, biomass and yield in a rolled-leaf population were higher in medium-and high-density populations, relative to Xat leaf populations.…”

Section: Introductionmentioning

confidence: 99%

Over-expression of rice OsAGO7 gene induces upward curling of the leaf blade that enhanced erect-leaf habit

Shi

Wang

Wan

et al. 2007

Planta

126

View full text Add to dashboard Cite

High-yield cultivars are characterized by erect leaf canopies that optimize photosynthesis and thus favor increased biomass. Upward curling of the leaf blade (called rolled leaf) can result in enhanced erect-leaf habit, increase erect duration and promote an overall erect leaf canopy. The rice mutant R05, induced through transferred DNA (T-DNA) insertion, had the rolled-leaf trait. The leaves in the wild type demonstrated natural drooping tendencies, resulting in decreasing leaf erection indices (LEIs) during senescence at the 20th day after flowering. Conversely, LEIs of the leaves in R05 remained high, even 20-day post-flowering. We applied T-DNA tagging and isolated a rolled-leaf gene from rice which, when over-expressed, could induce upward curling of the leaf blade. This gene encodes for a protein of 1,048 amino acids including the PAZ and PIWI conserved domains, belonging to the Argonaute (AGO) family. There are at least 18 members of the AGO family in rice. According to high-sequence conservation, the rolled-leaf gene in rice could be orthologous to the Arabidopsis ZIP/Ago7 gene, so we called it OsAGO7. These results provide a possible opportunity for implementing OsAGO7 gene in crop improvement.

show abstract

Section: Introductionmentioning

confidence: 99%

Over-expression of rice OsAGO7 gene induces upward curling of the leaf blade that enhanced erect-leaf habit

Shi

Wang

Wan

et al. 2007

Planta

126

View full text Add to dashboard Cite

show abstract

“…Besides the curvature of the unfolded leaf (app. 71°) that decreases the possible stress (force per unit area) the leaf must resist (King et al 1996), three different types of leaf stiffening concepts were found along the P. tenax leaf: (1) the leaf folding in the basal part (Fig. 1, P1 and P2), (2) the merging of the folded part ( Fig.…”

Section: Discussionmentioning

confidence: 99%

Functional plant cell wall design revealed by the Raman imaging approach

Richter

Müssig

Gierlinger

2011

Planta

View full text Add to dashboard Cite

Using the Raman imaging approach, the optimization of the plant cell wall design was investigated on the micron level within different tissue types at different positions of a Phormium tenax leaf. Pectin and lignin distribution were visualized and the cellulose microfibril angle (MFA) of the cell walls was determined. A detailed analysis of the Raman spectra extracted from the selected regions, allowed a semi-quantitative comparison of the chemical composition of the investigated tissue types on the micron level. The cell corners of the parenchyma revealed almost pure pectin and the cell wall an amount of 38-49% thereof. Slight lignification was observed in the parenchyma and collenchyma in the top of the leaf and a high variability (7-44%) in the sclerenchyma. In the cell corners and in the cell wall of the sclerenchymatic fibres surrounding the vascular tissue, the highest lignification was observed, which can act as a barrier and protection of the vascular tissue. In the sclerenchyma high variable MFA (4°-40°) was detected, which was related with lignin variability. In the primary cell walls a constant high MFA (57°-58°) was found together with pectin. The different plant cell wall designs on the tissue and microlevel involve changes in chemical composition as well as cellulose microfibril alignment and are discussed and related according to the development and function.

show abstract

“…The winding or curling of fresh leaf lamina can be phenotypic characteristic of some modern plant species and seems to represent an adaptation to reduce air movement around under surface of leaves, reducing water loss through less area exposed to direct sun (Abrams, 1990;Phebalium species, Australian National Botanic Gardens, 2000) and/or to gain structural stiffness, maintaining the efficient sun light interception under adverse conditions (for instance, as in species of Phormium, King et al, 1996). However, this feature can be created in some leaves during their decay process after abscission in the litter or on ground surface (= curled dry leaves), or even while still in connection with mother-plant, at some stage in the leaf aging (Xiao and Chen, 2011).…”

Section: Final Remarksmentioning

confidence: 99%

Diagnose emendada de Gangamopteris buriadica Feistmantel do Permiano do Gondwana

Iannuzzi

Bernardes-de-Oliveira

Pillai³

et al. 2016

Geol. USP. Sér. Cient.

View full text Add to dashboard Cite

This study aims mainly to revaluate the diagnostic characters of Gangamopteris (?) buriadica Feistmantel based on the analysis of the type material, housed at the collection of the Geological Survey of India, Calcutta, and other specimens, housed in distinct collections of southeastern (São Paulo, Rio de Janeiro) and southern Brazil (Porto Alegre). A recent reexamination of the type material revealed an unusual taphonomic feature which is characterized by the lateral folding of the leaf lamina under itself. This fact leads to a new interpretation of the leaf shape from a lanceolate-spathulate to a more ovate to obovate outline. Additionally, the partial view of the lamina hinders the observation of the true lateral veins pattern in their full extent, which inclines towards the lateral margins. As a consequence of this reinterpretation, we propose an amendment to the species original diagnosis, to include the curled lamina and lateral venation pattern of leaf margins as diagnostic characters of the species. Some specimens from the Early Permian strata of the Paraná Basin also show the same diagnostic characters and therefore have been included in this fossil-species. Consequently, the occurrence of G. buriadica Feistm. emend. is confirmed and extended to the Paraná Basin, being stratigraphically (e.g., Itararé Group and Rio Bonito Formation) and geographically (e.g., São Paulo and Rio Grande do Sul states) spread over southeast-southern Brazil. Finally, the taxonomic, taphonomic and ecological implications of the presence of curled leaves are briefly discussed.Keywords: Gangamopteris buriadica; Morphotaxonomy; Curled leaf; Indo-Brazilian Gondwana flora; Early Permian. ResumoO principal objetivo deste estudo é reavaliar os caracteres diagnósticos de Gangamopteris (?) buriadica Feistmantel com base na análise do material tipo, depositado na coleção do Serviço Geológico da Índia, Calcutá, e outros espécimes depositados em distintas coleções situadas no sudeste (São Paulo, Rio de Janeiro) e sul (Porto Alegre) do Brasil. Um recente reexame do material tipo revelou uma feição tafonômica única: a lâmina foliar está lateralmente dobrada sobre si mesma. Este fato implica em uma nova interpretação da forma da folha de um contorno lanceolado-espatulado para um mais ovalado-obovado. Além disso, a visão apenas parcial da lâmina não permite o entendimento do verdadeiro padrão das veias laterais por completo, as quais se inclinam em direção às margens laterais. Como uma conseqüência desta reinterpretação, propomos uma emenda à diagnose original desta espécie, a fim de incluir a lâmina curvada e o padrão de venação das margens laterais da folha como características diagnósticas da mesma. Alguns outros espécimes dos estratos permianos iniciais da Bacia do Paraná, também demonstraram essas mesmas feições diagnósticas e por isso foram incluídas nesta espécie fóssil. Conseqüentemente, a ocorrência de G. buriadica Feistm. emend. é confirmada e estendida para a Bacia do Paraná, sendo estratigráfica (Grupo Itararé e Formação Ri...

show abstract

Curling and folding of leaves of monocotyledons — a strategy for structural stiffness

Cited by 31 publications

References 2 publications

Over-expression of rice OsAGO7 gene induces upward curling of the leaf blade that enhanced erect-leaf habit

Over-expression of rice OsAGO7 gene induces upward curling of the leaf blade that enhanced erect-leaf habit

Functional plant cell wall design revealed by the Raman imaging approach

Diagnose emendada de Gangamopteris buriadica Feistmantel do Permiano do Gondwana

Contact Info

Product

Resources

About