scholarly journals Growth Responses of Rice Plants to Environmental Conditions : IV. The effect of air- and soil-temperature upon translocation and distribution of 14C.

1974 ◽  
Vol 43 (3) ◽  
pp. 410-415 ◽  
Author(s):  
Kanoe SATO
2017 ◽  
Vol 47 (2) ◽  
pp. 159-165 ◽  
Author(s):  
J.A. Wheeler ◽  
N.M. Gonzalez ◽  
K.A. Stinson

Microhabitat environmental conditions are an important filter for seedling establishment, controlling the availability of optimal recruitment sites. Understanding how tree seedlings respond to warming soil temperature is critical for predicting population recruitment in the future hardwood forests of northeastern North America, particularly as environmental conditions and thus optimal microhabitat availabilities change. We examined the effect of soil warming of 5 °C during the first growing season on germination, survival, phenology, growth, and stem and root biomass allocation in Acer rubrum L. (red maple) seedlings. While there was no effect of soil warming on germination or survival, seedlings growing in warmer soils demonstrated significantly accelerated leaf expansion, delayed autumn leaf senescence, and an extended leaf production period. Further, seedlings growing in warmer soils showed larger leaf area and stem and root structures at the end of the first growing season, with no evidence of biomass allocation trade-offs. Results suggest that A. rubrum seedlings can capitalize on soil warming by adjusting leaf phenology and leaf production, resulting in a longer period of carbon uptake and leading to higher overall biomass. The absence of growth allocation trade-offs suggests that A. rubrum will respond positively to increasing soil temperatures in northeastern forests, at least in the early life stages.


Weed Science ◽  
1990 ◽  
Vol 38 (6) ◽  
pp. 518-521 ◽  
Author(s):  
Robert E. Blackshaw

A study was conducted under controlled environmental conditions to determine the effect of soil temperature, soil moisture, and depth of seed burial on the emergence of round-leaved mallow. Emergence occurred from 5 to 30 C but was optimal at 15 to 20 C. Soil moisture had a greater effect than soil temperature on percentage emergence. Emergence progressively declined below a soil water content of −0.28 MPa, with less than 20% emergence attained at −1.03 to −1.53 MPa. In contrast, rate of emergence of round-leaved mallow was affected more by soil temperature than by moisture. A decrease in temperature from 30 to 5 C increased the time to reach 50% emergence by 10 to 12 days over the moisture regime of this study. Emergence was greatest at depths of 0.5 to 2 cm. No emergence occurred at 8 cm or below. The potential of using the findings of this study to develop cultural control strategies for round-leaved mallow is discussed.


1963 ◽  
Vol 55 (6) ◽  
pp. 558-560 ◽  
Author(s):  
R. K. Tew ◽  
S. A. Taylor ◽  
G. L. Ashcroft

2011 ◽  
Vol 6 (1) ◽  
pp. 37-41 ◽  
Author(s):  
Hinanit Koltai ◽  
Yoram Kapulnik

2011 ◽  
Vol 5 (12) ◽  
pp. 37-41 ◽  
Author(s):  
Hinanit Koltai ◽  
Yoram Kapulnik

1956 ◽  
Vol 30 (2-3) ◽  
pp. 157-164 ◽  
Author(s):  
R. D. Winslow

There is a winter dormancy in the hatchability of some species of Heterodera. The dormancy varies in degrees with eelworm species, being slight in the case of beet eelworm and more pronounced in the case of potato-root eelworm and some other species. It is not wholly dependent on immediate environmental conditions but possibly is induced by previous conditions. The dormancy can be shortened by storing infested soil at certain temperatures, but the cessation of dormancy in spring is not necessarily associated with rise in soil temperature.


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