Seedling growth of Mora gonggrijpii, a large seeded climax species, under different soil and light conditions

Vegetatio ◽  
1994 ◽  
Vol 112 (2) ◽  
pp. 161-170 ◽  
Author(s):  
Hans Steege
Keyword(s):  
Seedling Growth ◽  
Light Conditions ◽  
Climax Species

scholarly journals Phytochrome interacting factors 4 and 5 control seedling growth in changing light conditions by directly controlling auxin signaling

2012 ◽  
Vol 71 (5) ◽  
pp. 699-711 ◽  
Author(s):  
Patricia Hornitschek ◽  
Markus V. Kohnen ◽  
Séverine Lorrain ◽  
Jacques Rougemont ◽  
Karin Ljung ◽  
...  
Keyword(s):  
Seedling Growth ◽  
Auxin Signaling ◽  
Light Conditions ◽  
Changing Light

scholarly journals Enhanced Seed Germination and Seedling Growth of Tillandsia Eizii In Vitro

HortScience ◽  
2003 ◽  
Vol 38 (1) ◽  
pp. 101-104 ◽  
Author(s):  
Kimberly A. Pickens ◽  
James M. Affolter ◽  
Hazel Y. Wetzstein ◽  
Jan H.D. Wolf
Keyword(s):  
Seed Germination ◽  
In Vitro Culture ◽  
Seedling Growth ◽  
Culture Medium ◽  
Habitat Destruction ◽  
Light Conditions ◽  
Physiological Constraints ◽  
Large Numbers ◽  
In The Wild

Tillandsia eizii is an epiphytic bromeliad that due to over-collection, habitat destruction, and physiological constraints has declined to near threatened status. This species exhibits high mortality in the wild, and seed are characterized by low percentages of germination. As a means to conserve this species, in vitro culture protocols were developed to enhance seed germination and seedling growth. A sterilization protocol using 70% ethanol for 2 minutes followed by 2.6% NaOCl for 40 minutes disinfested seed and promoted seedling growth. Sucrose incorporated into the culture medium had no effect on germination or growth, while NAA inhibited growth, but not germination. Cultures maintained under a 16-hour photoperiod at 22 °C exhibited greater growth than those grown at 30 °C. Seed that germinated in the dark remained etiolated and failed to develop even after transfer to light conditions. Plants grown in vitro were successfully acclimatized and transferred to the greenhouse. Over 86% survival and rapid growth were obtained with either an all-pine-bark medium, or a mixture of 2 redwood bark: 2 fir bark: 2 potting mix: 1 perlite. This demonstrated that in vitro culture of seed may be used to rapidly produce large numbers of T. eizii, and thus can be used for the conservation and reintroduction of this species.

The effect of shade upon seedling growth in groundsel bush (Baccharis halimifolia L.)

1977 ◽  
Vol 28 (4) ◽  
pp. 681 ◽  
Author(s):  
FD Panetta
Keyword(s):  
Seedling Growth ◽  
Reproductive Output ◽  
Experimental Period ◽  
Height Growth ◽  
Light Conditions ◽  
Baccharis Halimifolia ◽  
Relative Growth ◽  
Relative Growth Rates ◽  
Treatment Comparisons ◽  
Reduced Light

Analysis of seedling growth of groundsel bush (Baccharis halimifolia L.) under different glasshouse light conditions indicated that seedlings growing in light shade (24% daylight) maintained relative growth rates equal to those of seedlings grown unshaded (57% daylight) for up to 11 weeks after germination. Compensation for reduced light was effected through increased leaf area rather than through increased photosynthetic efficiency. Although markedly less than in unshaded or light shade treatments, growth was maintained throughout the experimental period under the lowest radiant flux employed (17% daylight). Root systems developed more slowly and were smaller in shaded than in unshaded seedlings. Increased stem allocation (height growth) followed a peak in root allocation, and did not occur until 11 weeks after germination in any treatment. Comparisons of seed weight and seedling relative growth rate with associated pasture species indicate that groundsel is at a disadvantage in terms of both parameters. It appears that the success of this woody weed is due largely to a combination of high reproductive output and effective dispersal, which enables it to colonize relatively open microsites which occur in cultivated as well as natural field situations.

Effect of BPA on the germination, root development, seedling growth and leaf differentiation under different light conditions in Arabidopsis thaliana

Chemosphere ◽  
2013 ◽  
Vol 93 (10) ◽  
pp. 2585-2592 ◽  
Author(s):  
Wen-Juan Pan ◽  
Can Xiong ◽  
Qiu-Ping Wu ◽  
Jin-Xia Liu ◽  
Hong-Mei Liao ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Seedling Growth ◽  
Root Development ◽  
Light Conditions ◽  
Leaf Differentiation

scholarly journals Smoke-Water Enhances Germination and Seedling Growth of Four Horticultural Crops

Plants ◽  
2019 ◽  
Vol 8 (4) ◽  
pp. 104 ◽  
Author(s):  
Elsadek ◽  
Yousef
Keyword(s):  
Plant Species ◽  
Seedling Growth ◽  
Field Experiments ◽  
Light Conditions ◽  
White Willow ◽  
Dark Conditions ◽  
Water Treatments ◽  
The Impact ◽  
Smoke Water ◽  
Germination Parameters

The impact of plant-derived smoke as a promoter of seed germination in many crops is well documented. However, very little is known about (1) the appropriate plant species for smoke-water preparation, (2) the effect of smoke-water on the germination and the post-germination parameters in non-fire-prone environments, and (3) the relative importance of dark and light conditions and their possible effects. To fill these gaps in knowledge, we conducted field experiments to evaluate the effect of smoke-water produced from five plant species—white willow, sage, rice straw, rosemary, and lemon eucalyptus—on the germination and seedling growth of cucumber, tomato, scotch marigold, and gladiolus. The seeds and cormels were soaked in smoke-water under light or dark conditions. The results revealed that the smoke-water treatments derived from white willow and lemon eucalyptus enhanced germination, post-germination parameters, and macro element content whilst also contributing to dormancy-breaking. In addition, these smoke-water treatments significantly reduced abscisic acid content and increased α-amylase activity under light conditions; however, the stimulating effects were absent under dark conditions. In conclusion, we provide new evidence that germination and seedling growth in non-fire-prone environments can be enhanced by plant-derived smoke, and that stimulating impacts depend on the plant species used to prepare the smoke-water.

Sign in / Sign up

Export Citation Format

Share Document