Studies on the Photosynthesis of Some Species of Camellia

The photosynthesis of five species of Camellia was investigeted. The results were as follows: (1) there were significant differences of photosynthetic rate existing among the species.(2) the highest photosynthetic rate in the tested species was 16 times as much as the lowest in April and 2.5 times in July respectively. (3) the daily-changing pattern of photosynthetic rate was similar in different species and showed a clear mid-day depression of photosynthesis. The yearly photosynthetic rate changes of these species could be classified as three different types. The content of chlorophyll had no significant relation to photosynthetic rate when leaves had fully developed. Not all stomas were closed after photosynthesis ceased roughly.