Cuticular resistance to Diplocarpon rosae

1981 ◽  
Vol 77 (3) ◽  
pp. 665-666 ◽  
Author(s):  
P. Castledine ◽  
B.W.W. Grout ◽  
A.V. Roberts
2012 ◽  
Vol 42 (1) ◽  
pp. 167-178 ◽  
Author(s):  
Aoi Nakamoto ◽  
Takefumi Ikeda ◽  
Emiko Maruta

The browning and death of needles of evergreen conifers in alpine regions occur mainly in early spring at the point where the shoot protrudes from the snowpack. They are thought to be caused by excessive transpiration due to mechanical damage to the cuticle or to a thinner cuticle. However, there are a few studies that do not necessarily agree with this idea. We assessed needle browning and death in Pinus pumila (Pallas) Regel. in the alpine region of Japan in relation to mechanical damage to the cuticle, cuticular resistance, and cuticle thickness. Mechanical damage was not observed on needle cuticles of Pinus pumila browning in a natural environment. The color of needles with artificially abraded cuticles changed from green to brown in the abraded part. However, the brown color at the abraded part differed from the brown of a browning needle in its natural environment. There was no correlation between cuticular resistance and cuticle thickness. Needle browning and death in P. pumila were not related to mechanical damage of the cuticle or to cuticle thickness but might be due to changes in the quality and structure of the cuticle and other stresses.


2019 ◽  
Vol 133 (1) ◽  
pp. 103-117
Author(s):  
Cindy Rouet ◽  
Elizabeth A. Lee ◽  
Travis Banks ◽  
Joseph O’Neill ◽  
Rachael LeBlanc ◽  
...  

2010 ◽  
Vol 37 (7) ◽  
pp. 3583-3591 ◽  
Author(s):  
Emma W. Gachomo ◽  
Manfredo J. Seufferheld ◽  
Simeon O. Kotchoni
Keyword(s):  

1975 ◽  
Vol 2 (4) ◽  
pp. 647 ◽  
Author(s):  
CP Meyer ◽  
MJ Canny

CO2 is known to be highly soluble in oils. The hypothesis investigated was that the contents of leaf oil glands in Eucalyptus spp, might constitute a significant reservoir for CO2 within the leaf. Solubilities of CO2 in extracted oil from E. socialis leaves were measured and found to be 3-6 times that of CO2 in water. The volume of oil glands constitutes up to 12% of the total leaf volume. It is shown that the possible capacity of this reservoir for CO2 could at most amount to the equivalent of about 35 min of dark respiration, and therefore could not constitute a significant internal reservoir in the dark period. There appears to be a correlation between oil-gland percentage volume and the rainfall where the trees grew. Values are given for the percentage volume of the other tissues of the leaf and for cuticular resistance to CO2 diffusion.


1955 ◽  
Vol 42 (4) ◽  
pp. 379-384 ◽  
Author(s):  
Harold S. Shirakawa
Keyword(s):  

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