scholarly journals Analysis of Plant Growth and Yield in Varieties of Tomato (Solanum lycopersicum L.) Grafted onto Different Eggplant Rootstocks

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Evy Latifah ◽  
Amik Krismawati ◽  
Mohammad Saeri ◽  
Zainal Arifin ◽  
Bas Warsiati ◽  
...  
Keyword(s):  
Growth Rate ◽  
Plant Growth ◽  
Leaf Area ◽  
Relative Growth Rate ◽  
Net Assimilation Rate ◽  
Growth And Yield ◽  
Assimilation Rate ◽  
Relative Growth ◽  
Tomato Plants ◽  
Net Assimilation

This study aimed to examine plant growth of tomato grafted onto different eggplant rootstocks. We applied a randomized block design comprising twelve treatments with three replicates. Three varieties of tomato—Cervo, Karina, and Timoty—and three rootstocks—Gelatik, EG203 line, and Solanum torvum—were selected for this study. Nongrafted tomato plants of the same varieties were used as controls. The variables recorded were the number of branches, the diameter of scions and rootstocks, root length, and root dry weight at 4, 6, 8, and 10 weeks after planting (WAT) and relative growth rate, specific leaf area, and net assimilation rate at 4, 8, and 12 WAT. Grafted tomato plants demonstrated better growth than controls. There was a significant relationship between yield, plant growth parameters, and photosynthetic organs, expressed by higher production, greater scion diameter, longer roots, and increased relative growth rate, leaf area ratio, and net assimilation rate of grafted plants, compared to the controls.

scholarly journals Growth of marandu palisadegrass subjected to strategies of intermittent stocking

2009 ◽  
Vol 66 (6) ◽  
pp. 733-741 ◽  
Author(s):  
Alessandra Aparecida Giacomini ◽  
Sila Carneiro da Silva ◽  
Daniel Oliveira de Lucena Sarmento ◽  
Cauê Varesqui Zeferino ◽  
Salim Jacaúna Souza Júnior ◽  
...  
Keyword(s):  
Growth Rate ◽  
Leaf Area ◽  
Relative Growth Rate ◽  
Weight Ratio ◽  
Crop Growth ◽  
Net Assimilation Rate ◽  
Assimilation Rate ◽  
Relative Growth ◽  
Crop Growth Rate ◽  
Net Assimilation

Grazing strategies alter sward leaf area patterns of growth, affecting herbage accumulation and utilisation. The objective of this experiment was to evaluate the growth of marandu palisadegrass (Brachiaria brizantha cv. Marandu) swards subjected to strategies of intermittent stocking. The experiment was carried out in Piracicaba, São Paulo, Brazil, from October/2004 to September/2005. Swards were grazed at 95 and 100% canopy light interception (LI) to post-grazing heights of 10 and 15 cm, following a 2 × 2 factorial arrangement with four replications in a randomised complete block design. The response variables evaluated were: crop growth rate, relative growth rate, net assimilation rate, leaf area ratio and leaf weight ratio. In early and late spring, the highest crop growth rate was recorded for treatment 95/15 (11.2 and 10.1 g m-2 day-1, respectively), along with high values of net assimilation rate (4.4 and 6.9 g m-2 day-1, respectively), leaf area ratio (0.0095 and 0.0103 m-2 g-1, respectively) and leaf weight ratio (0.56 and 0.56 g g-1, respectively). To compensate reductions in net assimilation rate plants made some morphological and physiological adjustments increasing leaf area and leaf weight ratio. Relative growth rate and net assimilation rate were 26 and 50% higher, respectively, on swards grazed at 95% than at 100% LI. In early spring treatments 100/10 and 95/15 resulted in the highest relative growth rate (0.086 and 0.059 g m-2 day-1, respectively). Treatment 95/15 resulted in the most favourable pattern of growth (crop growth rate, relative growth rate, net assimilation rate), particularly during the transition period between winter and spring.

scholarly journals Seed Yield of Mungbean (Vigna radiata(L.) Wilczek) in relation to Growth and Developmental Aspects

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
M. M. A. Mondal ◽  
A. B. Puteh ◽  
M. A. Malek ◽  
M. R. Ismail ◽  
M. Y. Rafii ◽  
...  
Keyword(s):  
Growth Rate ◽  
Leaf Area ◽  
Relative Growth Rate ◽  
Growth Parameters ◽  
Net Assimilation Rate ◽  
Growth Stages ◽  
Flower Initiation ◽  
Assimilation Rate ◽  
Relative Growth ◽  
Net Assimilation

Growth parameters such as leaf area (LA), total dry mass (TDM) production, crop growth rate (CGR), relative growth rate (RGR), and net assimilation rate (NAR) were compared in six varieties of mungbean under subtropical condition (24°8′ N 90°0′ E) to identify limiting growth characters for the efficient application of physiology breeding for higher yields. Results revealed that a relatively smaller portion of TDM was produced before flower initiation and the bulk of it after anthesis. The maximum CGR was observed during pod filling stage in all the varieties due to maximum leaf area (LA) development at this stage. Two plant characters such as LA and CGR contributed to the higher TDM production. Results indicated that high yielding mungbean varieties should possess larger LA, higher TDM production ability, superior CGR at all growth stages, and high relative growth rate and net assimilation rate at vegetative stage which would result in superior yield components.

Comparative analysis of 1st-year growth in six deciduous tree species

1980 ◽  
Vol 10 (1) ◽  
pp. 35-41 ◽  
Author(s):  
R. E. Farmer Jr.
Keyword(s):  
Growth Rate ◽  
Leaf Area ◽  
Relative Growth Rate ◽  
Tree Species ◽  
Net Assimilation Rate ◽  
Deciduous Tree ◽  
Assimilation Rate ◽  
Relative Growth ◽  
Quercus Species ◽  
Net Assimilation

Classical growth analysis was used to examine the basis of major variation in seedling growth characteristics among and within six deciduous tree species in nursery beds. A combination of high investment in leaf area and substantial net assimilation rate accounted for the high relative growth rate of Liriodendrontulipifera L. and Prunusserotina Ehrh.; these species also produced the largest seedlings in the test. Final weight of four Quercus species was closely associated with initial leaf area established at germination; Q. rubra L. and Q. prinus L. had the largest seedlings despite having net assimilation rates lower than Q. alba L. and Q. ilicifolia Wangenh., the smallest seedlings in the test. Within species, relative growth rate was significantly correlated with both net assimilation rate and relative growth rate of leaf area. Leaf area partition coefficient was positively correlated with relative growth rate in L. tulipifera, P. serotina, and Q. rubra but not in Q. alba, Q. prinus, and Q. ilicifolia.

scholarly journals Evaluación de respuestas fisiológicas de la planta arbórea Hibiscus rosasinensis L, (Cayeno) en condiciones de campo y vivero

2010 ◽  
Vol 11 (1) ◽  
pp. 61 ◽  
Author(s):  
Nestor Dario Cuéllar ◽  
Juan Manuel Arrieta Herrera
Keyword(s):  
Growth Rate ◽  
Leaf Area ◽  
Relative Growth Rate ◽  
Area Ratio ◽  
Net Assimilation Rate ◽  
Silvopastoral Systems ◽  
Assimilation Rate ◽  
Relative Growth ◽  
Hibiscus Rosa Sinensis ◽  
Net Assimilation

<p>Con la finalidad de conocer y entender las características fisiológicas y productivas de especies forrajeras con una alta potencialidad para ser involucradas dentro de los sistemas silvo-pastoriles, se llevó a cabo el presente estudio sobre Hibiscus rosa-sinensis. Las plantas se ubicaron bajo condiciones de vivero (17°C) y siembra directa en campo (22°C), en la estación experimental La Esperanza, localizada en el municipio de Fusagasugá (Cundinamarca, Colombia) a 4°16´34´´ N y 23´11´´ W, 1750 msnm, 20°C de temperatura promedio, 1200 mm./año, el 81% de humedad relativa y 1387 horas de luz/año. Los muestreos se realizaron cada ocho (8) días y se evaluaron los estados de crecimiento y desarrollo de la especie forrajera Hibiscus y el modelo de distribución radicular. Cuando la planta de Hibiscus rosa-sinensis se desarrolla bajo condiciones de vivero se genera un modelo de raíz gravitrópico, fuerte, con dos raíces principales pivotantes, con abundantes y extensas raíces laterales primarias y secundarias (Modelo Tsutsumi et al, 2003); por el contrario, en campo el modelo predice que las plantas desarrollan un modelo radicular plagio-gravitrópico superficial; a los 105 días la relación raíz:brote (R:B) es muy deficiente (0,16), frente a las de vivero (0,25). Las dos (2) raíces principales y las laterales primarias y secundarias no son muy abundantes. Hasta los 105 días después de la siembra, las plantas bajo las condiciones de vivero son superiores a las establecidas en siembra directa en su índice de área foliar (IAF), área foliar efectiva (AFE), tasa de asimilación neta (TAN) y, por consiguiente, en su tasa de crecimiento relativo (TCR); a partir de este tiempo, las plantas en campo comienzan una fase de crecimiento exponencial, como lo mostró la TCR y la TAN. La especie Hibiscus rosa-sinensis necesariamente requiere una fase de vivero de hasta los 98 o 105 días. El sistema de raíz desarrollado por la planta permite conocer que la fertilización temprana no sería viable y que ésta se puede realizar a partir de los 60 días después del transplante, cuando el desarrollo alométrico de la planta es equilibrado. Las tasas e índices fisiológicos (TAN, RAF, AFE, IAF, TCR) nos permiten proponer la especie Hibiscus rosa-sinensis como una planta óptima para los sistemas de silvopastoreo y planificar las labores culturales y agronómicas como especie forrajera.</p><p> </p><p><strong>Evaluating Physiological Responses to Hibiscus rosa-sinensis L. under Conditions of Direct Planting and Nursery</strong></p><p>Aiming to know and understanding the physiological and productive forages species traits potentially to get involved into silvopastoral systems, this experiment were conducted at nurserys (17°C) and direct sown (22°C) conditions. The experimental station “La Esperanza” is in Fusagasugá, Colombia at 4°16´34´´N and 23´11´´´W, 1750 masl, 20°C average temperature, 1200 mm/year, 81% RH, 1387 light hour/year. The sampling were realized each eight (8) days and assessing variability in growth, cumulative leaf area, aboveground biomass, mean relative growth rate, mean net assimilation rate, and mean leaf area ratio related to forages specie Hibiscus rosa-sinensis L. Moreover were evaluated a distribution roots model. Plant species widely differ in their grown potential when they are grown under different conditions. The results shown that H. rosa-sinensis rising in nursery conditions had a more elongated, greater radial growth and gravitrópic roots than those of direct planting plants. The ratio between roots and shoot is strongly and positive related to the nursery (0.75) and poor in direct sown (0.16) conditions during 105 days after planting (dap). Also another factor as physiology (the net assimilation rate, specific leaf area, leaf area ratio) can explain the difference in RGR (relative growth rate) between species grown in nursery and direct planting conditions. At this stage (105 days) the plants shown the highest values on relative growth and net assimilation rate in nursery conditions. Furthermore the Hibiscus rosa-sinensis specie require grown in a nursery phase until 98 days to optimum conditions to planting in open fields. Fees and physiological indices (TAN, RAF, SLA, LAI, RGR) allow us to propose the species Hibiscus rosa-sinensis as an optimal plant silvopastoral systems and cultural planning and agricultural work as a forage.</p>

Genetic Variation in the Effects of Root Impedance on Growth and Transpiration Rates of Wheat and Barley

1992 ◽  
Vol 19 (2) ◽  
pp. 109 ◽  
Author(s):  
J Masle
Keyword(s):  
Growth Rate ◽  
Relative Growth Rate ◽  
Time Course ◽  
Net Assimilation Rate ◽  
Root Penetration ◽  
Lower Sensitivity ◽  
Soil Resistance ◽  
Assimilation Rate ◽  
Relative Growth ◽  
Net Assimilation

Genotypes of wheat and barley, including modern and landrace lines, were compared in their response to soil resistance to root penetration during the early vegetative phase (up to 5 leaf stage). All genotypes exhibited reduced growth and transpiration rates at high soil resistance, but there was large variation in the magnitude and time course of these effects and in the mechanisms underlying the growth reduction (changes in net assimilation rate, carbon partitioning within the plant, relative effects of leaf primordia development, versus growth of expanding leaves). Similar wide ranges of responses were observed among landrace and modern wheats. In both wheat and barley, the genotypes with lower sensitivity to soil resistance, in terms of relative growth rate, were those with the slowest net assimilation rate and root growth rate at low soil resistance, and those for which carbon allocation to the impeded roots, relative to the shoot, was significantly increased, to the extent that root relative growth rate even became greater (in terms of mass, not of length) than on loose soil. For a number of genotypes, growth was slowed down throughout the experiment whereas for others it was reduced only during the first few days following germination. In contrast, transpiration rate was at all stages lower at high than at low soil resistance. This indicates that the effects of soil resistance to root penetration on stomatal conductance involve different controls - or different sensitivities to a common signal - from those operating on cell division and expansion.

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