Saturday, 07 September 2019 15:49

Chimeric Albino Redwood Cones 2019

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 chimera cone 4 2019

After the initial discovery of chimeric albino redwood cones was made in 2015, another four years would pass before we could see this super rare phenomenon again in Coast redwoods. Amazingly in the fall of 2019 another tree was found to exhibit sectorial, candy cane like variegation. Like with the first discovery, clear lines of delineation could be seen separating both the albino and green genotypes on this sectorial chimera.

 

chimera cone 5 2019

Here's a view of the sectorial albino chimera that produced the chimeric cones in 2019. Within the foliage, you can see the boarders between white and green genotypes extending down several branches. In the lower portion of the picture you can see albino and chimeric cones originating from the variegated sections of the tree.

 chimera cone 6 2019

The sectorial chimera variegation as it appears on the tree. Note how the middle cone appears split down the middle between the two genotypes. Again this is incredibly rare to see and one of natures's beautiful expressions of color. 

 

chimera cone 2a 2019

 

As we zoom under the microscope, we can see the clear boarders between the mutation and normal green cells on this chimeric cone. 

chimera cone 3 2019

In the last picture we see the same cone a week later after it started splitting open. What adds another level of mystery to the mutational pattern is how the chimeric boundary between the white & green genotypes do not always follow the diamond pattern seen when the cones start splitting open. Seeds originating from these boarder sections may produce chimeric albino seedings. It's estimated that approximately 30 cones on the tree were entirely albino, while just 10 exhibited the chimeric albino variegation seen here. Unlike what was seen in the 2015 discovery, this mutation does not appear to be the pale variety and is closer to the pure white phenotype. For more information on the discovery of this tree's cones, please visit the "2019 Tales of White Trees" section of the site here: 2019 Tales of White Trees. Seeds from this tree will be collected and propagules hopefully will display chimeric variegation similar to what was seen in 2015.

Read 136 times Last modified on Monday, 14 October 2019 10:42

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