Chlorophyll content can be used as an indicator of photosynthesis efficiency. You can defiantly correlate it with photosynthetic assimilation indirectly. However, gas exchange parameters (IRGA) of measuring photosynthesis and respiration rate gives you more acceptable results for carbon storage.
Of course my dear brother because the high chlorophyll content leads to an increase in the process of photosynthesis which leads to a high storage of carbon in the plant.
This is a very complex relationship and there is a risk of concluding a straight relationship here. The question is too broad and open to give a simple answer. Are we discussing the relative chlorophyll index of a single species in the same geographic location, then it could be correlated to carbon storage. We cannot generalize this relationship because several factors interact to affect carbon storage, such as species, location, chlorophyll efficiency and so on. Depending on the objective, this relationship should be critically evaluated.
The chlorophyll content is an indicator of photosynthesis efficiency. More the the chlorophyll better the photosynthetic efficiency. And i think better photosynthetic efficiency leads to high carbon storage in the plant.
Efficiency of photosynthesis for production of assimilates like sugars is a coordinated process. You need capture of light, activate electrons in an electron transport chain and finally capture CO2 to produce sugars. If some part of this cyclic process is missing, it reduces C storage as sugars- eg plants under stress will not be as efficient in producing the photosynthate.
Yes it can be used as an indirect indicator. Although high chl content, several other factors do influence the carbon storage. IRGA would be really an ideal way to measure and also chlorophyll stability index. Also whether chl content are correlated with sugars during photosynthesis can be checked.