scholarly journals Relevance of leaf morphology and biometrics: a study with species of Aphelandra R. Br. (Acanthaceae)

2021 ◽  
Vol 9 (4) ◽  
pp. 317-321
Author(s):  
Livia Zottele ◽  
Elisa Mitsuko Aoyama ◽  
Alexandre Indriunas
Keyword(s):  
Leaf Blade ◽  
Leaf Morphology ◽  
Morphological Characteristics ◽  
Biometric Data ◽  
Blade Length ◽  
Biometric Parameters ◽  
Total Length ◽  
Standard Deviations ◽  
Morphological Patterns

Morphological characteristics, as well as biometrics, govern the description of species. However, systematical comparative analyzes of these aspects between taxa are scarce. The aim of the work was to evaluate the relevance of these characteristics in species of Aphelandra. Leaves of A. longiflora, A. harleyi, A. espirito-santensis, A. nitida, A. sinclairiana and A. squarosa were collected and analyzed for morphologic patterns: phyllotaxis, texture, leaf blade form, symmetry, apex, base, margin, venation and coloring pattern; and for biometric parameters: total length, length and width of the leaf blade, length and diameter of the petiole. We calculated mean and standard deviations. Among the relevant morphological patterns are the shape of the blade, apex and base, and the biometric data showed differences. As conclusion, this analysis proposal proves to be an instrument of accuracy and detail for descriptions.

scholarly journals Variasi Morfologi Bambu Tali [Gigantochloa apus (Schult.F.) Kurz.] pada berbagai ketinggian tempat di Sub Daerah Aliran Sungai Pelus

Biosfera ◽  
2015 ◽  
Vol 32 (1) ◽  
pp. 42 ◽  
Author(s):  
Tria Fauzi Prabandani Hakim ◽  
Pudji Widodo ◽  
Eming Sudiana
Keyword(s):  
Leaf Blade ◽  
Morphological Character ◽  
Morphological Characteristics ◽  
Close Correlation ◽  
Sea Levels ◽  
Morphological Variations ◽  
Blade Length ◽  
Central Java ◽  
Altitudinal Difference ◽  
Difference Effect

A study on the morphological variation of tali bamboo [Gigantochloa apus (Schult.f.) Kurz] has been conducted at various altitudes of Sub Watershed Pelus Banyumas, Central Java. This study was aimed at determining the morphological variations in relation to altitudes above sea levels. The method used was survey with stratified sampling.  The variables measured included culm diameter, culm internode length, culm sheath length and width, ovate-triangular blade length and width, leaf blade length and width, stem color and hairs, and altitude. The results of this study indicated that the altitudinal difference effect some morphological characteristics of tali bamboos such as: 1) green young seedling with black hairs found at 200-299 m and 300-399 m asl. 2) morphological variations are effected by altitude. Tali bamboo grows optimally at the altitude of 400 to 499 m asl. The results of regression analysis showed that the altitude has a relatively close correlation with somes of morphological character of tali bamboo.

scholarly journals Vegetative Development and Nutrient Absorption March of Sorrel (Rumex acetosa L.)

2019 ◽  
Vol 11 (4) ◽  
pp. 262
Author(s):  
Maria Angélica Suedan Souza Lima ◽  
Anastácia Fontanetti ◽  
Márcio Roberto Soares ◽  
Rodrigo Gazaffi ◽  
Nathalia de França Guimarães ◽  
...  
Keyword(s):  
Leaf Area ◽  
Leaf Blade ◽  
Herbaceous Plant ◽  
Rumex Acetosa ◽  
Vegetative Development ◽  
Blade Length ◽  
Perennial Herbaceous Plant ◽  
Biometric Parameters ◽  
Significant Difference ◽  
Plant Collection

Sorrel (Rumex acetosa L.) is an unconventional food plant. It is a perennial herbaceous plant that forms thickets. There are studies related to the accumulation of nutrients in sorrel, but there is no information on its absorption march and vegetative development. The objective of this study is to determine macronutrient absorption and biometric parameters of sorrel during 60 days after seedling transplantation (DAT) of seedlings. The experiment was completely randomized with eight treatments and four replications. It was conducted in a greenhouse. The treatments consisted of plant collection times, performed at 15, 20, 25, 30, 35, 40, 50 and 60 DAT. Plants’ biometric parameters (leaf blade length, relative leaf area, and shoot fresh and dry matter) and macronutrient absorption march were evaluated. Biomass, leaf blade length and relative leaf area of sorrel plants increased over time and, more markedly, after 35 DAT. The maximum levels of macronutrients accumulated in sorrel shoots, in descending order, were K > N > Ca > Mg > P > S. There was no significant difference in Ca and S contents among collection times, that is, the absorption and accumulation of these nutrients by sorrel did not vary throughout the evaluation time.

scholarly journals Landmark-based morphometry reveals phyllometric diversity along the shoot axis of the grapevine (Vitis vinifera L.)

2018 ◽  
Vol 14 (s1) ◽  
pp. 1-9
Author(s):  
Bodor Péter ◽  
Baranyai László ◽  
Szekszárdi Andrea ◽  
Bisztray György Dénes ◽  
Bálo Borbála
Keyword(s):  
Vitis Vinifera ◽  
Leaf Morphology ◽  
Morphological Characteristics ◽  
Morphological Diversity ◽  
Leaf Damage ◽  
Vitis Vinifera L ◽  
Graphic Software ◽  
High Diversity

Leaf morphology of the grapevine (Vitis vinifera L.) cv. ‘Kövidinka’ was evaluated based on 32 landmarks. The aim of this study was to reveal leaf morphological diversity along the shoot axis. For this purpose 10 shoots were collected with 26 to 35 leaves. Altogether 304 leaf samples were digitised and analysed with the GRA.LE.D 2.04. raster graphic software. Leaf damage was estimated based on the missing landmarks on the lamina. Our results showed that the leaves on the 11th and 13th nodes are the most intact, without missing landmarks. Lowest variability (cv = 0,126) of the investigated 54 morphological characteristics were observed among the leaves on the 11th nodes of the shoots, in accordance with the literature. Based on the results length of the veins, angles between the veins and further features such as size of the serrations show high diversity along the shoot axis. These results underline the need of careful sampling during the ampelometric investigations.

scholarly journals The effect of the height gradient on morphological traits of Dracocephalum nutans L.

2021 ◽  
Vol 38 ◽  
pp. 00024
Author(s):  
Gulnora Denisova ◽  
Safarbek Rahimov
Keyword(s):  
Morphological Traits ◽  
Leaf Blade ◽  
Morphological Characters ◽  
Altitude Gradient ◽  
Blade Length ◽  
Wide Range ◽  
Inflorescence Length ◽  
Height Factor

Individuals of Dracocephalum nutans L. have been studied at different altitude levels from 460 to 2437 m above the level seas. The influence of the height gradient on morphological characters has been shown: the number of generative and vegetative shoots, the height of the generative shoot, the length and width of the leaf blade, length of its petiole, and inflorescence length. It was found that the height gradient has the greatest influence on the height of the generative shoot and the length of the inflorescence. When individuals grow higher along the altitude gradient, the height of the generative shoot and the length of the inflorescence decrease. The fluctuation of the average values of the traits of D. nutans in a wide range was established. The intrapopulation analysis of D. nutans individuals does not depend on the height factor.

Discordance Mapping of Argyre Basin: An Insight into the Fluvial and Subglacial Origin of Valley Networks in the Argyre Basin Region

2021 ◽  
Author(s):  
Rickbir Bahia ◽  
Anna Galofre ◽  
Stephen Covey-Crump ◽  
Merren Jones ◽  
Neil Mitchell
Keyword(s):  
Ice Sheet ◽  
Morphological Characteristics ◽  
Drainage Density ◽  
Recent Analysis ◽  
Surface Slope ◽  
The South ◽  
Total Length ◽  
Topographic Slope ◽  
Valley Networks ◽  
Slope Direction

<p><strong>Introduction:</strong>  Martian valley networks are evidence for surface run-off and past water cycles on ancient Mars. Many of the networks resemble terrestrial precipitation-fed systems; however, recent analysis has found that the geometries and morphological characteristics of some valley networks are more comparable to subglacial valley formation. Subglacial valleys have morphological characteristics that make them distinct from fluvial valley systems (i.e., those formed via precipitation or sapping erosion). Unlike fluvial valley networks, which follow the surface slope of the underlying topography, sub-glacial networks are orientated in the direction of the surface slope of the overlying ice-sheet. Therefore, subglacial valleys may have orientations that are discordant with the underlying topography. Discordance analysis, a technique that compares the valley paleoslope direction and topographic slope direction, has been applied to Mars to determine areas that have undergone topographic modification since valley formation. This technique could also be a tool for identify valleys with potential sub-glacial origins.</p><p>In this study, we mapped and applied discordance analysis to valley networks in and around Argyre basin. Detailed analysis was performed on four valley networks on eastern Argyre, to determine whether their characteristics are indicative of a fluvial or sub-glacial origin.</p><p><strong>Results:</strong> 2669 V-Shaped valleys (total length = 36155.5 km) and 45 U-Shaped valleys (total length = 2683.5 km) were identified. Most V-Shaped valleys dissect the eastern and northern rim of Argyre Basin, with fewer in the south and west. The densest northern valley networks have values up to 0.098 km<sup>-1</sup>, compared to the densest in the south with values of only 0.040 km<sup>-1</sup>. U-Shaped valleys are prominent along the south/south-west rim, but are lacking along the northern rim of Argyre.</p><p>Most valleys (47.8 %) are concordant (< 45° discordance) with present slope direction. Two dense groups of discordant valleys are present adjacent to Hale Crater and Nia Vallis. These areas display features associated with the presence of an ice-sheet/glacier – e.g., glacial moraines and eskers. Additionally, the morphology of these valley systems are consistent with a subglacial origin.</p><p>Fento Vallis and the Darwin Crater valley system are concordant with present topographic slope, and are in close proximity to one another; however, their morphologies differ greatly. Fento Vallis consists of 25 valleys (total valley length of ~ 690 km) and drainage density of 0.019 km<sup>-1</sup>. The Darwin Crater valley network consists of 49 valleys (total valley length of ~ 1351 km) and drainage density of 0.048 km<sup>-1</sup>. Fento Vallis displays features (e.g., inner channel eskers) indicative of a subglacial origin. Alternatively, the Darwin Crater System has a planform associated with fluvial activity and originates from cirque like depressions. Although the Darwin Crater system appears to have a fluvial origin, less than 100 km to the east is Pallacopas Vallis, which displays inner eskers indicating that it has a subglacial origin.</p><p>Three of the networks analysed, which are > 1000 km apart from one another, are likely subglacial in origin. Their occurrence indicates that an ice-sheet or multiple ice-sheets were present along the eastern region of Argyre throughout its history.</p>

scholarly journals Utilization of Machine Vision to Monitor the Dynamic Responses of Rice Leaf Morphology and Colour to Nitrogen, Phosphorus, and Potassium Deficiencies

2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Yuanyuan Sun ◽  
Jiali Gao ◽  
Ke Wang ◽  
Zhangquan Shen ◽  
Lisu Chen
Keyword(s):  
Machine Vision ◽  
Dynamic Analysis ◽  
Leaf Morphology ◽  
Temporal Dynamics ◽  
Leaf Growth ◽  
Morphological Characteristics ◽  
Extension Rate ◽  
Nondestructive Monitoring ◽  
P Deficiency ◽  
Rice Leaf

Machine vision technology enables the continuous and nondestructive monitoring of leaf responses to different nutrient supplies and thereby contributes to the improvement of diagnostic effects. In this study, we analysed the temporal dynamics of rice leaf morphology and colour under different nitrogen (N), phosphorus (P), and potassium (K) treatments by continuous imaging and further evaluated the effectiveness of dynamic characteristics for identification. The top four leaves (the 1st incomplete leaf and the top three fully expanded leaves) were scanned every three days, and all images were processed in MATLAB to extract the morphological and colour characteristics for dynamic analysis. Subsequently, the mean impact value was applied to evaluate the effectiveness of dynamic indices for identification. According to the results, higher nutrient supply resulted in a faster leaf extension rate and a lower developing rate of chlorosis, and the influence of N deficiency on leaf growth was the greatest, followed by P deficiency and then K deficiency. Furthermore, the optimal indices for identification were mainly calculated from morphological characteristics of the 1st incomplete leaf and colour characteristics of the 3rd fully expanded leaf. Overall, dynamic analysis contributes not only to the exploration of the plant growth mechanism but also to the improvement of diagnostics.

scholarly journals Heterosis in Local Boro Rice (Oryza sativa L.)

1970 ◽  
Vol 23 (1) ◽  
pp. 19-30
Author(s):  
MM Islam ◽  
U Sarker ◽  
MG Rasul ◽  
MM Rahman
Keyword(s):  
Grain Yield ◽  
Seed Weight ◽  
Harvest Index ◽  
Leaf Blade ◽  
Flag Leaf ◽  
Leaf Sheath ◽  
Panicle Length ◽  
Blade Length ◽  
Days To Maturity ◽  
Standard Heterosis

An experiment was conducted to study the heterosis of 27 F1 hybrids produced from nine CMS lines and three restorer lines of rice with their parental lines and BRRI Dhan29 as standard check for 17 yield and its contributing traits. Mid parent, better parent and standard heterosis of most of the crosses were significant for most of the characters studied either in positive or in negative direction. Desirable and significant mid parent and better parent heterosis was observed in 13 and seven cross combinations, respectively for grain yield and most of its related traits. Considering more than 20% mid parent and better parent heterosis for grain yield along with most of its related traits, nine and five cross combinations, respectively were identified as good heterotic combinations over mid parental and better parental value. On the basis of individual trait significant and desirable mid parent heterosis was observed in eight cross combinations for plant height, 12 for leaf blade length, nine for flag leaf blade length, 13 for flag leaf sheath length, eight for tillers per hill, eight for panicles per hill, 14 for days to 50% flowering, four for days to maturity, four for panicle length, 14 for panicle weight, nine for primary branches per panicle, 16 for secondary branches per panicle, six for filled grains per panicle, 15 for 1000 seed weight, 13 for grain yield per hill and 15 for harvest index. Significant and desirable better parent heterosis was observed in 12 cross combinations for plant height, 11 for leaf blade length, 5 for flag leaf blade length, nine for flag leaf sheath length, seven for tillers per hill, seven for panicles per hill, 25 for days to 50% flowering, one for days to 100% flowering, seven for days to maturity, three for panicle length, nine for panicle weight, five for primary branches per panicle, 12 for secondary branches per panicle, four for filled grains per panicle, nine for 1000 seed weight, seven for grain yield per hill and nine for harvest index. None of the crosses were identified as good heterotic over standard check for grain yield per hill but many good and desirable heterotic crosses were identified over standard check for most of the yield related characters. Twenty cross combinations were identified as heterotic over standard check due to desirable and significant standard heterosis for most of the yield related traits.   Keywords: Heterosis; rice; Oryza sativa; boro DOI: http://dx.doi.org/10.3329/bjpbg.v23i1.9314 BJPBG 2010; 23(1): 19-30

scholarly journals EFFECT OF SELECTED PREPARATIONS ON SOME BIOMETRIC FEATURES OF ‘TARDIVA’ PANICLED HYDRANGEA (Hydrangea paniculata Siebold) DEPENDING ON THE IRRIGATION FREQUENCY

2019 ◽  
Vol 18 (2) ◽  
pp. 39-51
Author(s):  
Wojciech Durlak ◽  
Barbara Marcinek ◽  
Mariusz Szmagara ◽  
Margot Dudkiewicz ◽  
Aleksandra Konopińska-Mamej
Keyword(s):  
Water Consumption ◽  
Leaf Blade ◽  
Root Zone ◽  
Irrigation Frequency ◽  
Blade Length ◽  
Biometric Features ◽  
Vapor Gard

One of the ways to reduce the water consumption by plants while maintaining their proper quality is to use substances that limit excessive transpiration. Three preparations at following concentrations: Moisturin (10%), Root-Zone (4.5%) and Vapor Gard (1%), were used in the experiment. Moisturin and Vapor Gard were applied in the form of a single spray, and Root-Zone as a single irrigation in mid July.The aim of the research was to assess the effect of several anti-transpirants on some biometric features of the ‘Tardiva’ panicled hydrangea depending on the frequency of irrigation. The following parameters were measured: area, perimeter, width and length of leaf blade, length and width of inflorescences, and the diameter of shoots. Treatment of H. paniculata cv. ‘Tardiva’ with Root-Zone and Moisturin anti-transpirants with a single irrigation every other day allows to reduce the water consumption and obtain shrubs of a quality comparable with plants irrigated twice a day. The use of Moisturin with a twice daily irrigation positively affected the length and width of inflorescences.

scholarly journals Preliminary biometric characteristics of Greyster dogs

2021 ◽  
Vol 17 (1) ◽  
pp. 1-9
Author(s):  
Hieronim Frąckowiak ◽  
Mateusz Brylewski ◽  
Katarzyna Pęzińska-Kijak ◽  
Maciej Zdun
Keyword(s):  
Body Length ◽  
Leg Length ◽  
Biometric Data ◽  
Rectangular Shape ◽  
Biometric Parameters ◽  
Pelvic Limb ◽  
Chest Girth ◽  
Biometric Indices

<b>The aim of the study was to record and analyse selected biometric data based on the results of measurements of Greyster dogs actively involved in sports. The results of our study were compared with the biometric indices of other breeds of dogs, including the original breeds from which Greysters derive, and the indices of Polish native breeds. The study showed that the Greysters were characterised by intermediate height, as compared with their original breeds, i.e. they were shorter than Greyhounds and taller than German Shorthaired Pointers, and their height index was lower than one. This means that the height at the withers dominated over the diagonal body length in the rectangular shape of the Greyster body. The massiveness index showed that the advantage of the chest girth over the height at the withers was similar to that of the Polish Greyhound. The Greyster eurysomy index was also similar to that of the Polish Greyhound. The biometric parameters of Greysters incline them to run fast. This inclination was also indicated by the leg length index and the proportions of the length of the sections of the pelvic limb. Further research is necessary to obtain full biometric characteristics of Greysters. The results obtained at this stage of the research can be used as an auxiliary tool to select these animals for reproduction or sport competitions. If a breed standard is to be established for Greyster dogs and they are classified as an FCI breed, any information with biometric data may help to set this standard.

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