scholarly journals Correlation and path analysis of interaction between snap beans yield and its components with crop management

2021 ◽  
Vol 19 (1) ◽  
pp. 86-96
Author(s):  
N. Shaban
Keyword(s):  
Path Analysis ◽  
Leaf Area ◽  
Correlation Coefficient ◽  
Statistical Significance ◽  
Area Ratio ◽  
Leaf Area Ratio ◽  
Fresh Weight ◽  
Snap Beans ◽  
High Statistical Significance ◽  
Net Assimilation

PURPOSE: To assess the interaction between the applied some agronomic activities for the production of snap beans Phaseolus vulgaris cv. Starozagorski Cher using Path- correlation coefficient of analysis. METHODS: Using path analysis to illustrate real effect of minimizing doses of vegetative herbicide Basagran-200g/l (Bentazon-3-Isopropyl-1H-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide) and Fusillade-200g/l (Fluasifop-P-Butil-butyl 2-(4-{[5-(trifluoromethyl)pyridin-2-yl]oxy}phenoxy)propanoate) instead of using Dual 930EK/930g/l-s ( S-metachloras). Collecting data from long years, trials on plants treated with different combinations of foliar suspension fertilizer Lactofol® with pesticides. RESULTS: Growth rate RGR (mg g-1d-1) positively influenced by high statistical significance of the rate of net assimilation NAR– (mg.cm-2d-1). The correlation coefficient between the two indicators is (r = 0.692), followed by the dependence of RGR on the leaf area ratio LAR (cm2 mg-1) with a value of (r = 0.614). High statistical significance ​​of correlation expressing the interaction between the leaf area ratio LAR (cm2 mg-1) and - root weight ratio RWR (g.g-1) (r = 0. 0.837). Leaf area ratio LAR (cm2 mg-1) has a relatively high positive correlation with the rate of net assimilation NAR– (mg.cm-2d-1) (r = 0.508). Results showed that fresh weight of pod/studied variant (+++0.99), fresh weight of one pod (+++0.77), fresh weight of pods/ plant (+++0.67), calcium content in bean pods (++0.57), pods number /plant (++0.51), pollen fertility (++0.44) had positive impact on yield. The partial function of the studied parameters on variability of bean yield is 98.9%. Nitrate content had a major function to the yield (23.3%) followed by Pods/ kg (21.31%).Weeds manifestation caused most negative effect on yield (-0.64). CONCLUSIONS: This study reveals and identifies appropriate changes in applied agricultural techniques in the production of snap beans, which should be paid more attention to decrease water pollution caused by using the soil-applied herbicide without decreasing quantity and quality of yield.

Phenyl indole-3-thiolobutyrate increases growth of transplanted 1-0 red oak

1988 ◽  
Vol 18 (1) ◽  
pp. 131-134
Author(s):  
Daniel K. Struve ◽  
W. Timothy Rhodus
Keyword(s):  
Leaf Area ◽  
Butyric Acid ◽  
Dry Weight ◽  
Area Ratio ◽  
Leaf Area Ratio ◽  
Red Oak ◽  
Relative Growth ◽  
Auxin Treatment ◽  
Net Assimilation

The basal 1 cm of taproot of dormant bareroot 1-0 red oak (Quercusrubra L.) seedlings were given a 3-s dip in 20, 40, or 80 mM concentrations of indole-3-butyric acid (IBA), phenyl indole-3-thiolobutyrate (P-ITB), or equal parts IBA and P-ITB at 20 or 40 mM concentrations. Sixty control seedlings were dipped in 95% ethanol, while 30 seedlings were used for each auxin treatment. Seedlings were potted on May 12, 1986, and grown outdoors. At the end of the 104-day study period, all concentrations of IBA and P-ITB significantly increased number of roots regenerated (from 5.3 with 20 mM IBA to 11.9 for 80 mM IBA) compared with control seedlings. However, P-ITB-treated seedlings produced significantly more leaves (20–24) and leaf area (320–472 cm2), and up to 10 g more dry weight than IBA and non-auxin-treated seedlings. P-ITB treated seedlings had higher relative growth and net assimilation rates and lower leaf area ratio than IBA-treated or control seedlings. Seedlings treated with 20 mM of equal parts IBA and P-ITB were similar to P-ITB-treated seedlings while seedlings treated with the 40 mM IBA and P-ITB combination were similar to IBA-treated seedlings.

scholarly journals Growth of canola hybrids resistant and sensitive to herbicides

2020 ◽  
Vol 41 (6supl2) ◽  
pp. 2911-2922
Author(s):  
Miria Rosa Durigon ◽  
◽  
Joanei Cechin ◽  
Franciele Mariani ◽  
Gerarda Beatriz da Silva Pinto ◽  
...  
Keyword(s):  
Growth Rate ◽  
Leaf Area ◽  
Dry Matter ◽  
Area Ratio ◽  
Leaf Area Ratio ◽  
Net Assimilation Rate ◽  
Assimilation Rate ◽  
Absolute Growth Rate ◽  
Absolute Growth ◽  
Net Assimilation

Plant growth analysis is useful for determining adequate management practices and exploring the maximum yield potential of cultivars or hybrids. Canola hybrids with resistance to herbicides have been studied and registered for Brazilian conditions, as they improve weed management in canola crops. This study evaluated the growth of canola hybrids resistant to triazine or imidazolinone herbicides compared to a sensitive hybrid. The experiment was conducted using a completely randomized design, with four replications, in a bifactorial scheme using three hybrids and six sampling times. The canola hybrids used were Hyola 571CL (resistant to imidazolinones), Hyola 555TT (resistant to triazines), and Hyola 61 (sensitive to both herbicides). Height, leaf area, and dry matter of roots, leaves, stems, and shoots of the plants were evaluated at 14, 28, 42, 56, 70, and 119 days after emergence (DAE). The physiological indices absolute growth rate, leaf area ratio, specific leaf area, and net assimilation rate were calculated, and yield indices evaluated. Compared to Hyola 61, the Hyola 555TT hybrid showed lower values of leaf dry matter at 70 DAE, absolute growth rate up to 56 DAE, and net assimilation rate at 14 and 28 DAE, and a higher leaf area ratio at 56 DAE, whereas the hybrid Hyola 571CL presented lower leaf area and lower leaf dry matter at 70 DAE. At flowering, compared to Hyola 61, the hybrid Hyola 571CL presents lower leaf area, and the hybrids Hyola 555TT and Hyola 571CL have lower leaf dry matter accumulation. Differences in the growth of canola hybrids Hyola 555TT, Hyola 571CL and Hyola 61 do not cause differences in their grain yield.

EFFECT OF DAYLENGTH ON THE GROWTH OF WHEAT

1967 ◽  
Vol 45 (1) ◽  
pp. 117-131 ◽  
Author(s):  
D. J. C. Friend ◽  
V. A. Helson ◽  
J. E. Fisher
Keyword(s):  
Leaf Area ◽  
Dry Weight ◽  
Area Ratio ◽  
Leaf Area Ratio ◽  
Relative Growth ◽  
Stages Of Growth ◽  
Total Plant ◽  
Number Of Leaves ◽  
Net Assimilation ◽  
Daily Total

Leaf area per plant, total number of leaves and tillers, and total plant dry weight increased with increasing daylength over the range 8 to 24 h. The increase in the net assimilation rate and relative growth rate with increasing daily total radiation was similar to that obtained by raising the intensity of light given to plants grown under continuous illumination.During the vegetative phase of growth, the leaf area ratio decreased with increasing daylength, mostly because of an increased leaf thickness, again dependent on the level of total daily radiation. During the later stages of growth, earlier floral initiation at long daylengths caused an early decline in the leaf area ratio because of the rapid growth of the stem associated with inflorescence formation. This was a photoperiodic effect independent of the level of total daily radiation, as shown by supplementing an 8-h daylength with 8 h of low-intensity illumination.

Growth and Developmental Responses of Perennial Ryegrass Grown at Constant Temperature. I. Influence of Light and Temperature on Growth and Net Assimilation

1981 ◽  
Vol 8 (2) ◽  
pp. 181 ◽  
Author(s):  
WF Hunt ◽  
G Halligan
Keyword(s):  
Growth Rate ◽  
Leaf Area ◽  
Perennial Ryegrass ◽  
Response Curve ◽  
Maximum Growth ◽  
Area Ratio ◽  
Leaf Area Ratio ◽  
Exponential Growth Phase ◽  
Response Curves ◽  
Net Assimilation

Perennial ryegrass (Lolium perenne L. cv. 'Grasslands Ruanui') plants were grown spaced in nutrient golution under six levels of irradiance at six constant temperatures (7-33°C) to provide growth response curves to light and temperature over a range of growth conditions. Measurements were restricted to the exponential growth phase. Plants showed saturation-type growth kinetics with irradiance but the shape of the light response curve was temperature dependent and, conversely, the shape of the temperature response curve was irradiance dependent. Growth analysis revealed that, at 7, 10, 17 and 20°C, changes in leaf area ratio compensated for changes in net assimilation rate over a range in irradiance for which growth rate was maintained near maximum. At 30 and 33°C, the compensating effect of changes in leaf area ratio was insufficient to maintain near maximum growth at intermediate irradiances. Ontogenetic drifts in specific leaf area and leaf area ratio were compensated for by changes in net assimilation, so that relative growth rate remained constant. The maximum growth at 20°C resulted from a greater partitioning of dry weight to leaf than at lower temperatures, as well as higher net assimilation than at all other temperatures.

Invasion by Pittosporum undulatum of the forests of central Victoria. IV. Shade tolerance

1983 ◽  
Vol 31 (2) ◽  
pp. 151 ◽  
Author(s):  
RM Gleadow ◽  
KS Rowan ◽  
DH Ashton
Keyword(s):  
Leaf Area ◽  
Chlorophyll Concentration ◽  
Maximum Growth ◽  
Area Ratio ◽  
Leaf Area Ratio ◽  
Photon Flux ◽  
Mesophyll Cells ◽  
Fourfold Increase ◽  
Net Assimilation ◽  
Survival Of Seedlings

Seedlings of Pittosporum undulatum were grown under shade screens for 16 days at four flux densities: 97.8, 18.2, 3.4 and 0.4% full daylight, i.e. c. 420, 78, 14 and 2 W m-2. Seedlings showed moderate tolerance of shade: the growth compensation point for light was 1 .6% daylight, the leaf area ratio in full daylight was low (48.96 cm2 g-1) and when plants grown at 0.4% were compared with those grown at 97.8% full daylight and there was a fourfold increase in chlorophyll concentration. Leaves were thinner at the lowest flux density because the cells were deflated and there appeared to be only one row of palisade mesophyll cells. On the other hand, there was no large increase in leaf area ratio with shading, no alteration in the chlorophyll a/b ratio and no depression of net assimilation rate in full daylight. P. undulatum can endure shade but has a higher growth rate when grown at higher photon flux densities. P. undulatum is found predominantly in shade owing to the uneven dispersal of seed and the site-dependent survival of seedlings and not because shade is required for maximum growth.

scholarly journals Fitness Cost of Imazamox Resistance in Wild Poinsettia (Euphorbia heterophylla L.)

Agronomy ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1859
Author(s):  
Saeid Hassanpour-bourkheili ◽  
Mahtab Heravi ◽  
Javid Gherekhloo ◽  
Ricardo Alcántara-de la Cruz ◽  
Rafael De Prado
Keyword(s):  
Growth Rate ◽  
Leaf Area ◽  
Specific Leaf Area ◽  
Dry Weight ◽  
Area Ratio ◽  
Fitness Cost ◽  
Seed Plant ◽  
Growth Indices ◽  
Relative Growth ◽  
Net Assimilation

Wild poinsettia (Euphorbia heterophylla L.) is a difficult-to-control weed in soybean production in Brazil that has developed resistance to herbicides, including acetolactate synthase inhibitors. We investigated the potential fitness cost associated to the Ser-653-Asn mutation that confers imazamox resistance in this weed. Plant height, leaf and stem dry weight, leaf area and seed production per plant as well as the growth indices of specific leaf area, leaf area ratio, relative growth rate and net assimilation in F2 homozygous resistant (R) and susceptible (S) wild poinsettia progenies were pairwise compared. S plants were superior in most of the traits studied. Plant heights for S and R biotypes, recorded at 95 days after planting (DAP), were 137 and 120 cm, respectively. Leaf areas were 742 and 1048 cm2 in the R and S biotypes, respectively. The dry weights of leaves and stems in the S plants were 30 and 35%, respectively, higher than in the R plants. In both biotypes, the leaves had a greater share in dry weight at early development stages, but from 50 DAP, the stem became the main contributor to the dry weight of the shoots. The R biotype produced 110 ± 4 seed plant−1, i.e., 12 ± 3% less seeds per plant than that of the S one (125 ± 7 seed plant−1). The growth indices leaf area ratio and specific leaf area were generally higher in the S biotype or similar between both biotypes; while the relative growth rate and net assimilation rate were punctually superior in the R biotype. These results demonstrate that the Ser-653-Asn mutation imposed a fitness cost in imazamox R wild poinsettia.

Sign in / Sign up

Export Citation Format

Share Document