Characterization ofRolled and Erect Leaf 1in regulating leave morphology in rice

A hypothesis that elite erect leaf maize inbred lines are characterized by properties of an efficient photo-model and that as such are very desirable in increasing the number of plants per unit area (plant density) in the process of seed production has been confirmed in the present study. The properties of the observed elite erect leaf maize inbred lines were based on the effects and characteristics of thermal processes of delayed chlorophyll fluorescence occurring in their thylakoid membranes. The temperature dependence of the delayed chlorophyll fluorescence intensity, the Arrhenius plot for the determination of phase transitions (critical temperatures) and activation energy are the principal parameters of the thermal processes. Based on the obtained results on photosynthetic properties it was also possible to estimate the tolerance and adaptation of elite erect leaf maize inbred lines to high temperatures and drought.

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Sabal lougheediana (Arecaceae), a critically endangered, endemic palm species from Bonaire

Phytotaxa ◽

10.11646/phytotaxa.420.2.1 ◽

2019 ◽

Vol 420 (2) ◽

pp. 95-101

Author(s):

M. PATRICK GRIFFITH ◽

QUIRIJN COOLEN ◽

MICHELLE BARROS ◽

LARRY R. NOBLICK

Keyword(s):

Conservation Status ◽

Critically Endangered ◽

Fiber Bundles ◽

Island Endemic ◽

Palm Species ◽

Leaf Segments ◽

Diagnostic Key ◽

Erect Leaf

A new palm species, Sabal lougheediana, is described and illustrated. This critically endangered island endemic, native solely to Bonaire, is characterized by a compact crown of leaves, erect leaf segments, distinctive leaf scars, and frequently vascularized fiber bundles in leaflet transection. Detail on history, morphology, range, habitat, and conservation status is presented, along with a diagnostic key.

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Exploring agronomic strategies to improve oat productivity and control weeds: leaf type, row spacing, and planting density

Canadian Journal of Plant Science ◽

10.1139/cjps-2017-0354 ◽

2018 ◽

Vol 98 (5) ◽

pp. 1084-1093 ◽

Cited By ~ 3

Author(s):

Pufang Li ◽

Fei Mo ◽

Defeng Li ◽

Bao-Luo Ma ◽

Weikai Yan ◽

...

Keyword(s):

Crop Production ◽

Competitive Ability ◽

High Density ◽

Weed Suppression ◽

Planting Density ◽

Row Spacing ◽

Environment Interaction ◽

Weed Biomass ◽

Intermediate Density ◽

Erect Leaf

The trade-off between crop production and weed control is a fundamental scientific issue, as it is frequently influenced by individual crop competitive ability, population density, and planting pattern. A 2 yr field study was conducted to examine the relationship between planting density and row spacing, using two contrasting oat varieties. On average, high planting density (480 plants m−2) reduced weed biomass at oat maturity by 59% in 2012 and by 56% in 2013, when compared with a low density (120 plants m−2). The droopy-leaf variety suppressed weed biomass by up to 69% and weed density up to 72%, compared with the erect-leaf variety. In a drier year, the greatest grain yield was achieved with the droopy-leaf variety under the intermediate density, while in 2013, the erect-leaf variety under the high density had similar yield to the droopy-leaf variety at the intermediate density. A general trend was that increasing plant density suppressed weed infestation, and promoted crop biomass and yield. The droopy-leaf variety exhibited a strong competitive ability under the intermediate planting density, while the erect-leaf variety had a strong competitive ability under the high density. Taken together, there was a complex variety-by-environment interaction to achieve the balance between crop production and weed suppression, which was mediated by growing-season conditions.

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A comparison of barley cultivars with different leaf inclinations

Australian Journal of Agricultural Research ◽

10.1071/ar9720945 ◽

1972 ◽

Vol 23 (6) ◽

pp. 945 ◽

Cited By ~ 41

Author(s):

JF Angus ◽

R Jones ◽

JH Wilson

Keyword(s):

Dry Matter ◽

Canopy Structure ◽

The Other ◽

Dry Matter Production ◽

Visible Radiation ◽

Area Index ◽

Assimilation Chamber ◽

Barley Cultivars ◽

Matter Production ◽

Erect Leaf

Under conditions of adequate moisture an erect-leaf barley cultivar, Lenta, responded to an increase in density (resulting from doubling of the sowing rate) with increases in dry matter production and in grain yield, whereas the cultivar Research, which has long lax leaves, responded with decreases in dry matter production and yield. In a study of canopy structure and its effects on light interception and utilization, it was found that in Research, with a leaf area index (LAI) of 6.1, the leaves were concentrated near the canopy surface and a relatively small proportion of the above-crop light penetrated through this layer. The net crop photosynthesis of this canopy (measured in a field assimilation chamber) was 3.8 g CO2/m2.hr when visible radiation was 313 W/m2. With Lenta (LAI 7.0) on the other hand, leaves were concentrated in the middle layers of the canopy and the light was more evenly distributed throughout the canopy. The net crop photosynthesis with the same radiation as for Research was 4.3 g CO2/m2.hr. The relative rates of photosynthesis at various levels in the canopies were determined by introducing 14CO2 into the assimilation chambers enclosing the cultivars and observing where the 14C was fixed. With Research most of it was localized near the canopy surface while with Lenta most of it was near the centre of the canopy. Of the 14CO2 taken up, 7 % was fixed in the leaf sheaths of Research and 12% in those of Lenta.

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Genetic, Environmental, and Physiological Control of Leaf Orientation in Plantago Lanceolata

Australian Journal of Biological Sciences ◽

10.1071/bi9680641 ◽

1968 ◽

Vol 21 (4) ◽

pp. 641 ◽

Cited By ~ 7

Author(s):

HN Barber ◽

DM Halsall ◽

JH Palmer

Keyword(s):

Light Intensity ◽

Plantago Lanceolata ◽

High Light Intensity ◽

Climatic Factor ◽

High Light ◽

Physiological Control ◽

Low Light ◽

Leaf Orientation ◽

Autumn And Winter ◽

Erect Leaf

Considerable diversity in genes controlling leaf orientation in P. lanceolata has been demonstrated in a population growing in the Sydney area. The expression of these genes is greatly influenced by both light intensity and temperature; low light intensity and high temperature induces erect leaf orientation, while conversely high light intensity and low temperature favours the formation of prostrate leaves. Gibberellin apparently blocks the expression of the genes for prostrate leaf orientation. It is suggested that the seasonal variation in air temperature may be the climatic factor chiefly responsible for the disappearance of prostrate leaf orientation in midsummer and for the reappearance of this character in autumn and winter.

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Effects of Tagetes erecta gel on experimentally induced oral ulcer model in rats

International Journal of Research in Pharmaceutical Sciences ◽

10.26452/ijrps.v11i2.2090 ◽

2020 ◽

Vol 11 (2) ◽

pp. 1844-1848

Author(s):

Lakshana S ◽

Vijayalakshmi S ◽

Dinakar J ◽

Asok Kumar K

Keyword(s):

Leaf Extract ◽

Oral Ulcer ◽

Albino Rats ◽

Tagetes Erecta ◽

Phytochemical Screening ◽

Standard Drug ◽

Ulcer Model ◽

African Marigold ◽

Wistar Albino Rats ◽

Erect Leaf

Tagetes erecta(African marigold) has various medicinal values. The present study has been undertaken to evaluate the effects of extracts of the fresh leaves and flowers of Tagetes erecta on oral ulcer models in Wistar albino rats. The anti-ulcer activity of the extracts of tagetes erecta (2.5% and 5%) was compared between the leaf and flower and also with the standard drug, Triamcinolone. Phytochemical screening of plant extract, extract action on oral ulcer and histopathology analysis were carried out. Tagetes erecta leaf and flower extracts have showed the presence of alkaloids, flavonoids, and carotenoids. Results showed that Tagetes erect leaf extract showed significant oral ulcer protective activity (83.6%) when compared with the standard drug Triamcinolone. In the present work, it can be concluded that the hydro alcoholic leaf and flower extractHistopathologys of Tagetes erectagel have better potential against oral ulcer which supports the traditional claims in folklore medicine.

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Intercropping Morphologically Different Types of Maize with Cowpeas: LER and Growth Attributes of Associated Cowpeas

Experimental Agriculture ◽

10.1017/s001447970001187x ◽

1981 ◽

Vol 17 (4) ◽

pp. 407-413 ◽

Cited By ~ 13

Author(s):

T. A. T. Wahua ◽

O. Babalola ◽

M. E. Aken'ova

Keyword(s):

Transmitted Light ◽

Land Equivalent Ratio ◽

Leaf Type ◽

Maize Cultivar ◽

Equivalent Ratio ◽

Maize Cultivars ◽

Different Types ◽

Growth Attributes ◽

Erect Leaf

SUMMARYLand Equivalent Ratio (LER) and cowpea growth attributes were used to evaluate three different maize cultivars for intercropping with cowpea, a low canopy crop. The relatively short maize cultivar (Kewesoke) with erect upper leaves transmitted the most light to cowpeas, followed by a liguleless erect-leaf type and then a floppy-leaf type. The more the transmitted light, the greater were the growth and yields of associated cowpeas.

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Distribution record of Musa borneensis var. sarawakensis Becc. and Musa campestris var. sarawakensis Becc. in West Kalimantan, Indonesia

Journal of Tropical Biodiversity and Biotechnology ◽

10.22146/jtbb.57681 ◽

2020 ◽

Vol 5 (3) ◽

pp. 172

Author(s):

Ari Sunandar ◽

Arif Didik Kurniawan

Keyword(s):

Morphological Character ◽

Morphological Characteristics ◽

Limited Information ◽

Leaf Base ◽

Purple Colour ◽

West Kalimantan ◽

Wild Banana ◽

Distribution Record ◽

New Distribution ◽

Erect Leaf

Borneo Island has a large number of wild banana species. As a part of Borneo Island, West Kalimantan has limited information about the diversity of wild bananas. This research aims to update the record distribution of wild bananas from Bonti District of Sanggau Regency and to determine their morphological characteristics. Exploration method and resident information were used in this study. Two species of wild bananas have been identified and considered as new distribution records in West Kalimantan Province, namely-Musa borneensis var. sarawakensis with morphological character pseudostem red-purple colour, sparse black-purple blotches at petiole base, leaf base shape rounded on both sides, male bud red-purple colour and Musa campestris var. sarawakensis with morphological character pseudostem yellow-green colour, inflorescence erect, leaf base one side rounded and one-pointed, the dorsally pink-purple and ventrally pink-purple colour of bract.

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