Wyniki wyszukiwania

1

Simple models for predicting leaf area of mango (Mangifera indica L.)

100%

Ghoreishi M., Hossini Y., Maftoon M.

Journal of Biology and Earth Sciences

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2012

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tom 02

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nr 2

2

Steady-state and dynamic photosynthetic performance and nitrogen partitioning in the shade-demanding plant Panax notoginseng under different levels of growth irradiance

100%

Chen J.-W., Kuang S.-B., Long G.-Q., Meng Z.-G., Li L.-G., Chen Z.-J., Zhang G.-H., Yang S.-C.

Acta Physiologiae Plantarum

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2014

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tom 36

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nr 09

In this study, we examined steady-state and dynamic photosynthetic performance and leaf nitrogen (N) partitioning in the typical shade-demanding herb Panax notoginseng grown along a light gradient. Gas exchange on a leaf area basis was significantly reduced under low irradiance, with gas exchange on a leaf mass basis reaching a maximum value and then decreasing along the light gradient. Specific leaf area significantly increased with decreasing irradiance levels (P<0.001), whereas carboxylation efficiency was decreased (P<0.001). In addition, decreasing growth irradiance levels led to declines in maximum carboxylation rate (Vcmax) and maximum electron transport rate (Jmax), although Vcmax/ mass and Jmax/mass were relatively less affected than Vcmax/area and Jmax/area. Slow photosynthetic response to simulated sunflecks was observed under low levels of growth irradiance, with stomatal limitations only detected in leaves grown under low-light conditions. Chlorophyll content increased significantly with decreasing irradiance levels. N content on a leaf mass basis apparently increased, while N content on a leaf area basis markedly decreased. The fraction of leaf N allocated to light-harvesting components increased significantly with decreasing growth irradiance levels, whereas the fraction allocated to carboxylation and bioenergetics was significantly reduced. As an adaptation strategy to growth irradiance, we conclude that adjustments in specific leaf area may be more important than changes in leaf physiology and biochemistry in typical shade-demanding species such as P. notoginseng.

3

Effects of sulphate level in the nutrient solution on plant growth and sulphur content in tomato plants

100%

Kowalska I.

Folia Horticulturae

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2005

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tom 17

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nr 1

91-100

4

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Effect of titanium on assimilation leaf area and chlorophyll content of very early-maturing potato cultivars

100%

Wadas W., Kalinowski K.

Acta Scientiarum Polonorum. Agricultura

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2017

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tom 16

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nr 2

5

Transport of assimilates from leaves to roots in cold-treated maize seedlings. Kinetics and assimilate distribution

100%

Sowinski P.

Acta Physiologiae Plantarum

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1995

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tom 17

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nr 4

6

Estimation of leaf area in wheat using linear measurements

100%

Chanda S. V., Singh Y. D.

Plant Breeding and Seed Science

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2002

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tom 46

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nr 2

7

Effect of municipal solid waste on the growth of maize (Zea mays L.)

84%

Simeon P. O., Ambah B.

International Letters of Natural Sciences

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2013

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tom 02

A pot experiment was conducted in the green house to determine the effect of municipal solid waste on the growth of maize (zea mays). Growth parameters of percentage emergence, plant height, leaf area and number of levers per plant were collect and subjected into statistical analysis, using ANOVA and fisher’s L.S.D. at 5 % probability level. Plant growth parameters decreased with increase in cropping cycle. Similarly, maize grown on dumpsite soils did better than the control soil samples. It show increase in plant height, leaf area and number of leaves per plant at a range of 16.82 cm to 12.87 cm, 5 to 4 and 64.69 cm to 59.88 cm for the dumpsite and control samples respectively. Soil PH, organic matter (OM), total Nitrogen (N), Phosphorus (P), Potassium (K), Calcium (Ca), Magnesium (Mg), Sodium (Na) and Effective Cat-ion Exchange Capacity (ECEC) decreased with increase in cropping cycle respectively. The Dumpsite soil sample recorded higher mean values than the control (P < 0.05). There is every indication that municipal solid waste is beneficial to plant if only proper and careful sorting and separation of hazardous waste is done.

8

Correlations between leafing phenology and traits: woody species of evergreen broad-leaved forests in subtropical China

84%

Liu Z.-G., Li K., Cai Y.-L., Fang Y.

Polish Journal of Ecology

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2011

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tom 59

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nr 3

Leaf phenology has been considered to evolve to maximize plant carbon gains, and it reflects plant life history strategies. To determine the effect of leaf traits on leaf phenology, leaf emergence (such as timing of leaf emergence, leaf expansion rate, durations of leaf expansion), leaf traits (leaf mass per area – LMA and leaf size), and their relationships were investigated for 40 woody species from 13 families in an evergreen broad-leaved forest, southeast China. Compared with understorey shrubs (23 species), trees species (17 species) were significantly later in timing of leaf emergence, greater in leaf area and leaf expansion rate. This is assumed to be a strategy for large-leaved tree species to decrease damage during leaf expansion. In terms of leaf size, the small-leaved species leafed out earlier than the species with large leaves, but the largeleaved species were greater in leaf expansion rate than their counterparts. Leaf expansion rate was positively correlated with leaf area and timing of leaf emergence. Leaf herbivore rate was positively correlated with leaf area and leaf expansion period, but negatively with LMA. These results suggest that large- and small-leaved species possibly employed different strategies to minimize herbivore damage. Small-leaved species avoid defoliator damage by early leafing, while largeleaved species have shorter expansion times and thereby shorten vulnerable time to herbivores. In general, dynamics of emergence and expansion of the woody species in the study forest indicate that the leaf phenology is of significance for species’ carbon gain and survival.

9

Post-recovery assessment of UV-B irradiation effects in oilseed rape plants

84%

Skorska E.

Rośliny Oleiste - Oilseed Crops

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1999

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tom 20

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nr 1

10

Evaluation of some bean lines tolerance to alkaline soil

84%

Radi A. A., Abdel-Wahab D. A., Hamada A. M.

Journal of Biology and Earth Sciences

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2012

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tom 02

|

nr 1

11

The response of lettuce to fluorescent light and led light relative to different nitrogen nutrition of plants

84%

Borowski E., Hawrylak-Nowak B., Michalek S.

Acta Scientiarum Polonorum. Hortorum Cultus

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2014

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tom 13

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nr 5

In two successive pot experiments with lettuce cv. ‘Królowa Majowych’, conducted in a phytotron, this study investigated the effect of cool white fluorescent light (FRS) at a PPFD 200 ȝmol·m-2·s -1 and red-blue LED light at a PPFD of 200 and 800 ȝmol·m-2·s -1 on photosynthesis, yield, leaf area, SLA, and the content of photosynthetic pigments, total N and nitrates. Experimental plants were grown in sphagnum peat supplemented with full-strength Hoagland’s solution at the beginning of the experiment. 10 days after plants were pricked out, 4 experimental series were made which differed in the form of N supplied to the growing medium at a rate of 420 mg (2N): 1) Hoagland’s solution (control); 2) Hoagl + 2N-NO3; 3) Hoagl + 2N-NH4; 4) Hoagl + 2N-NH4/NO3. The obtained results showed that the lettuce leaf yield under FRS light was distinctly higher than under LED light at a PPFD of 200, and in particular at 800 ȝmol·m-2·s -1. Besides, the leaves grown under FRS light showed a significantly thinner leaf blade (SLA) and a lower content of photosynthetic pigments, total N and nitrates. The photosynthetic rate was higher under LED light relative to FRS light. Different nutrition of plants with N-NO3, N-NH4 and N-NH4/NO3 had a similar effect on the yield and analysed traits of lettuce leaves, regardless of the type of light and the level of irradiation with LED light. LED lamps seem to be a very promising light source for plants, but they require further research on how to adapt the spectral distribution of light to their requirements.

12

Metoda oceny wskaźnika powierzchni liści z zastosowanim lotniczego skaningu lidarowego

84%

Popov M., Semko I., Kozak I.

Acta Agrophysica

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2014

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tom 21

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nr 2

Zaproponowana została metoda zdalnej oceny LAI z zastosowaniem materiałów lotniczego skaningu lidarowego. Obliczeniowa część metody opiera się na modelu regresji pomiędzy wartościami wskaźnika LAI i danymi lotniczego skaningu lidarowego. Opracowane zostały równania regresji wielokrotnej. Przedstawione zostały wyniki testowania proponowanej metody, które potwierdzają jej wydajność i wysoką dokładność. Przedstawiony został przegląd nowoczesnych metod oceny wskaźnika powierzchni liści (LAI) – jednego z najbardziej kompleksowych i obiektywnych wskaźników produkcyjnej aktywności roślinności. Krótko opisano naziemne metody oceny LAI oraz ich oprzyrządowanie. Zauważono, że główną i niewątpliwą zaletą naziemnej metody oceny LAI jest wiarygodność uzyskanych wyników. Przy konieczności oceny poziomu aktywności roślinności na dużych obszarach i przy ograniczonych zasobach czasowych, zastosowanie technik naziemnych napotyka poważne trudności. W takich przypadkach bardziej obiecującym okazuje się podejście związane z zastosowaniem zdalnych technik i technologii. Pokazano kierunki ewentualnych dalszych kroków do zwiększenia dokładności metody.

13

Energy flows in PSII as an alternative indicator of winter damages of wheat plants: a mass-scale approach

84%

Sasal M., Sniegowska K., Rapacz M.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

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2013

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tom 94

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nr 3

14

Using the conservative nature of fresh leaf surface density to measure foliar area

84%

Castillo O. S., Zaragoza E. M., Alvarado C. J., Barrera M. G., Dasgupta-Schubert N.

International Agrophysics

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2014

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tom 28

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nr 4

For a herbaceous species, the inverse of the fresh leaf surface density, the Hughes constant, is nearly conserved. We apply the Hughes constant to develop an absolute method of leafarea measurement that requires no regression fits, prior calibrations or oven-drying. The Hughes constant was determined in situ using a known geometry and weights of a sub-set obtained from the fresh leaves whose areas are desired. Subsequently, the leaf-areas (at any desired stratification level), were derived by utilizing the Hughes constant and the masses of the fresh leaves. The proof of concept was established for leaf-discs of the plants Mandevilla splendens and Spathiphyllum wallisii. The conservativeness of the Hughes constant over individual leaf-zones and different leaftypes from the leaves of each species was quantitatively validated. Using the globally averaged Hughes constant for each species, the leaf-area of these and additional co-species plants, were obtained. The leaf-area-measurement-by-mass was cross-checked with standard digital image analysis. There were no statistically significant differences between the leaf-area-measurement-by-mass and the digital image analysis measured leaf-areas and the linear correlation between the two methods was very good. Leaf-areameasurement- by-mass was found to be rapid and simple with accuracies comparable to the digital image analysis method. The greatly reduced cost of leaf-area-measurement-by-mass could be beneficial for small agri-businesses in developing countries.

15

Formation of the leaf surface and productivity of the chickling vetch (Lathyrus sativus L.) depending on the amounts of mineral fertilizers and pre-sowing inoculation of seeds

84%

Kaminkyi V., Sokyrko D., Hanhur V., Yeremko L.

Agronomy Science

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2021

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tom 76

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nr 2

16

The effect of foliar application of methanol on sugar beet (Beta vulgaris L.) plants grown in drought conditions

84%

Behrouzyar E. K., Yarnia M.

Annals of Warsaw University of Life Sciences - SGGW. Horticulture and Landscape Architecture

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2017

|

tom 38

17

Influence of laser light on leaf area and parameters of photosynthetic activity in DH lines of spring barley [Hordeum vulgare L.]

84%

Rybinski W., Garczynski S.

International Agrophysics

|

2004

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tom 18

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nr 3

18

Sitona weevils [Coleoptera: Curculionidae] feeding on pea [Pisum sativum L.]

84%

Wnuk A., Wiech K.

Polskie Pismo Entomologiczne

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1996

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tom 65

|

nr 1-2

19

Evapotranspiration of osteospermum Denebola and New Guinea impatiens Timor grown on ebb-and-flow benches as affected by climate conditions and soil water potential

84%

Treder J., Nowak J.

Acta Agrobotanica

|

2001

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tom 54

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nr 2

Daily evapotranspiration (EVPT) of two bedding plants osteospermum 'Dened impatiens 'Timor' grown on ebb-and-flow benches was measured by weighing method, together with assessment of indoor climate parameters (solar radiaperature, humidity) and leaf area index (LAI) at different growth phases. The 'on inside the greenhouse as affected by climatic factors i.e.: solar radiation, re, humidity and air velocity was also measured using Piche's evaporome:ts were irrigated according to soil water potential (irrigation at -0.5; -3; -ID 'a). Irrigation at high water potential decreased plant growth and leaf area of lts. LAI of osteospermum decreased as water deficit increased. In the case of .,~ the highest LAI at full flowering obtained plants irrigated at -3 kPa. actual, daily EVPT of plants irrigated at -0.5 kPa increased with plant growth in the case of osteospermum while that of impatiens remained at similar level. At flowering water stress decreased strongly EVPT of osteospermum and in lesser " . of impatiens. Osteospermum irrigated at -0,5 kPa had 2,5 higher EVPT than impatiens. For both plants good, positive correlation between EVPT and daily mean temperature between 7-17 h and evaporation according to Piche' s evaporometr readings were obtained. As expected EVPT was negatively correlated with relative irrespective the growth phase and soil water potential. The correlation and solar radiation, was changed during plant growth due to differences in temperature under shading screen, used during sunny days.

20

The effect of gibberellic acid [GA3] on the growth, photosynthetic pigment content and oil yield of patchouli [Pogostemon cablin Benth.] plants grown in shade condition

84%

Misra M.

Acta Physiologiae Plantarum

|

1995

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tom 17

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nr 4

Ograniczanie wyników

Simple models for predicting leaf area of mango (Mangifera indica L.)

Steady-state and dynamic photosynthetic performance and nitrogen partitioning in the shade-demanding plant Panax notoginseng under different levels of growth irradiance

Effects of sulphate level in the nutrient solution on plant growth and sulphur content in tomato plants

Effect of titanium on assimilation leaf area and chlorophyll content of very early-maturing potato cultivars

Transport of assimilates from leaves to roots in cold-treated maize seedlings. Kinetics and assimilate distribution

Estimation of leaf area in wheat using linear measurements

Effect of municipal solid waste on the growth of maize (Zea mays L.)

Correlations between leafing phenology and traits: woody species of evergreen broad-leaved forests in subtropical China

Post-recovery assessment of UV-B irradiation effects in oilseed rape plants

Evaluation of some bean lines tolerance to alkaline soil

The response of lettuce to fluorescent light and led light relative to different nitrogen nutrition of plants

Metoda oceny wskaźnika powierzchni liści z zastosowanim lotniczego skaningu lidarowego

Energy flows in PSII as an alternative indicator of winter damages of wheat plants: a mass-scale approach

Using the conservative nature of fresh leaf surface density to measure foliar area

Formation of the leaf surface and productivity of the chickling vetch (Lathyrus sativus L.) depending on the amounts of mineral fertilizers and pre-sowing inoculation of seeds

The effect of foliar application of methanol on sugar beet (Beta vulgaris L.) plants grown in drought conditions

Influence of laser light on leaf area and parameters of photosynthetic activity in DH lines of spring barley [Hordeum vulgare L.]

Sitona weevils [Coleoptera: Curculionidae] feeding on pea [Pisum sativum L.]

Evapotranspiration of osteospermum Denebola and New Guinea impatiens Timor grown on ebb-and-flow benches as affected by climate conditions and soil water potential

The effect of gibberellic acid [GA3] on the growth, photosynthetic pigment content and oil yield of patchouli [Pogostemon cablin Benth.] plants grown in shade condition