EFFECT OF PLANT AIR EXOMETABOLITES AND THEIR INFORMATION-ENERGY FIELDS ON BIOLOGICAL TESTS

The paper demonstrates that air exometabolites of plant natural and cut leaves and flowers are proved to effect the bio tests – seed germination. The degree and character of this influence quantity and character differ for various donor and acceptor plants. The biological action of products of plants transpiration remains under its accumulation in the activated carbon and frozen water. It is shown that the interaction of some plants on the others is caused by the interrelation of both aboveground organs and root systems. So,under beetroot seed generation the size of the seedlings roots in the controlled variant was 5.5 ± 0.9 cm, the stem size was 4.6 ± 06 cm. When growing sorrel and beetroot seeds together,the beetroot size of the roots was 3.1 ± 1.0 cm; the stem size was 3.1 ± 1.0 cm. It seems feasible to take into consideration this influence under combined planting of several crops.

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Allelopathic effect of aqueous extract from root systems of Johnson grass on seed germination and initial development of soybean, pea and vetch

Ratarstvo i povrtarstvo ◽

10.5937/ratpov49-1200 ◽

2012 ◽

Vol 49 (3) ◽

pp. 250-256 ◽

Cited By ~ 1

Author(s):

Kalinova Shteliyana ◽

Golubinova Irena ◽

Hristoskov Angel ◽

Ilieva Anna

Keyword(s):

Seed Germination ◽

Aqueous Extract ◽

Root Systems ◽

Allelopathic Effect ◽

Initial Development ◽

Johnson Grass

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Appropriate Removal of Forest Litter is Beneficial to Pinus tabuliformis Carr. Regeneration in a Pine and Oak Mixed Forest in the Qinling Mountains, China

Forests ◽

10.3390/f10090735 ◽

2019 ◽

Vol 10 (9) ◽

pp. 735

Author(s):

Xueying Huo ◽

Dexiang Wang ◽

Deye Bing ◽

Yuanze Li ◽

Haibin Kang ◽

...

Keyword(s):

Activated Carbon ◽

Seed Germination ◽

Natural Regeneration ◽

Mixed Forest ◽

Forest Litter ◽

Pine Forest ◽

Qinling Mountains ◽

Mixed Forests ◽

Pinus Tabuliformis ◽

Plant Ash

Research Highlights: Natural regeneration is important in pine–oak mixed forests (Pinus armandii Franch., Pinus tabuliformis Carr., and Quercus aliena Bl. var. acuteserrata Maxim.ex Wenz.), but allelopathy as a limiting factor has not been studied. Our research provides insights into allelopathy in pine–oak mixed forest litter. Background and Objectives: Allelopathy among tree species occupying the same ecological niche in mixed forests may adversely affect regeneration. We studied allelopathy in pine and oak forest litter to determine the effect on regeneration, whether it is offset by adding activated carbon or plant ash, and what allelopathic substances are present. Materials and Methods: We used laboratory seed culture and field seeding to determine pine and oak litter regeneration effects on P. tabuliformis and P. armandii in the Qinling Mountains, China. In the laboratory, we irrigated seeds with three different litter concentrations. A fourth treatment incorporated activated carbon. The field study established small quadrats in mixed forest to study how removing or retaining litter and spreading plant ash affected sown seeds. High performance liquid chromatography–mass spectrometry was used to compare differences in chemical substances in extracts with and without activated carbon. Results: Litter extracts significantly affected germination rates in both species. Seedling morphological and physiological indexes showed that litter extracts negatively affected growth in both species, but activated carbon alleviated this inhibitory effect on P. armandii. Forest stand and litter did not affect P. armandii seed germination. Pinus tabuliformis germination rates were significantly higher in plots with removed litter than when litter was retained or plant ash spread, and lower in oak than pine forest. Allelopathic substances detected in pine forest were trioctyl trimellitate, amyloid β-Peptide 10–20, and triisobutyl phosphate, potentially affecting P. armandii seed germination and growth. Conclusions: Appropriate removal of litter in mixed forests can improve the natural regeneration ability of P. tabuliformis.

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Activated-carbon-filled agarose hydrogel as a natural medium for seed germination and seedling growth

International Journal of Biological Macromolecules ◽

10.1016/j.ijbiomac.2021.02.097 ◽

2021 ◽

Vol 177 ◽

pp. 383-391

Author(s):

Lu Cao ◽

Na Li

Keyword(s):

Activated Carbon ◽

Seed Germination ◽

Seedling Growth ◽

Natural Medium ◽

Agarose Hydrogel

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Root development of container-reared, nursery-grown, and naturally regenerated pine seedlings

Canadian Journal of Forest Research ◽

10.1139/x83-033 ◽

1983 ◽

Vol 13 (2) ◽

pp. 239-245 ◽

Cited By ~ 11

Author(s):

T. J. Nichols ◽

A. A. Alm

Keyword(s):

Root Systems ◽

System Size ◽

Jack Pine ◽

Red Pine ◽

Root Weight ◽

Sectional Area ◽

Cross Sectional ◽

Stem Size ◽

Pine Seedlings ◽

Highly Correlated

Root systems of 6- to 10-year-old red pine (Pinusresinosa Ait.) and jack pine (Pinusbanksiana Lamb.) trees reared in various containers were excavated from four different sites and studied. Nursery-grown and naturally regenerated trees of similar age and stem size growing on the same sites were used for comparison. Root cross-sectional area (RCSA) taken 5 cm from the stem, a measurement found to be highly correlated (r = 0.94) with root weight (In–In transformation), was used to describe root system size. The average RCSA's of jack pine reared in paper pots, book planters, and nonribbed styroblock-2 containers were smaller than those of naturally regenerated seedlings, but the differences were not statistically significant. Jack pine and red pine reared in Ontario tubes had significantly larger RCSA's than nursery-grown trees. There were some differences in radial distribution of horizontal roots, and the apportionment between horizontal and vertical root components differed between some of the seedling types.

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