Pigment Changes and Photosynthetic Physiological Characteristics in Rapeseed with Purple-red Leaf

TANG Rong;HUANG Ze-su;WANG Hai;DAI Wen-dong;WANG Shao-ming;LI De-zhen;Guizhou Institute of Oil Crops;Guizhou Institute of Agricultural Science and Technology Information;

Rapeseed with purple-red leaf;;Physiological characteristics;;Anthocyanin;;Chlorophyll;;Photosynthetic rate;;Soluble sugar

To provide references for high-efficient breeding,popularization and utilization of rapeseed with purple-red leaf,to study the pigment and photosynthetic characteristics of purple-red leaf in rapeseed,the authors investigated the photosynthesis factors as anthocyanin and chlorophyll contents,photosynthetic rate,soluble sugar content. Results: The anthocyanin contents in purple-red leaf is 4. 901( A_(530)- 0.25A_(657)) /g at seedling stage,which is higher than in bolting and flowering stage. The one-day net photosynthetic rate presents as a single peak curve with highest value at 12: 30 am,and without photosynthetic lunch break in seedling stage. However,it appears as a double peak curve and with obvious photosynthetic lunch break in flowering stage. The chlorophyll contents in purple-red leaf is higher in seedling and flowering stage and lower in bolting stage. However,the soluble sugar increases gradually from seeding stage to bolting stage and then decreases obviously. The soluble sugar contents in deep purple-red leaf is the highest,8. 837 mg / g,followed by lilac leaf and green leaf. The significant negative correlation is found between anthocyanin and chlorophyll contents as well as chlorophyll contents and soluble sugar contents in purple-red leaf at seedling stage. The high significant positive and significant positive correlation are found between anthocyanin contents and soluble sugar contents in bolting stage and flowering stage,respectively.