钙及钙调素拮抗剂CPZ对柿果实采后生理的影响

Effect of Calcium and Calmodulin Antagonist Chlorpromazine (CPZ) on Physiology of Postharvest Persimmon Fruit

柿果在生长期喷施高于1%的CaCl_2可增加果实采收时的钙浓度,但造成叶面伤害,不能延迟柿衰老。喷施1%Ca(OH)_2显著地增加了果实钙含量,在贮藏过程中果实乙烯浓度显著高于对照。减压渗透CaCl_2可显著降低柿果呼吸强度、乙烯浓度、膜透性和PG酶活性,抑制果实软化,其中4%CaCl_2渗透最好。减压渗透CPZ促进呼吸增强、乙烯产生和果实软化。

The 'Huo' persimmon trees were sprayed with CaCl_2(1,2,3%) and Ca(OH)_2(1%) at the fruit growing period and fruits were hypobaric infiltrated with CaCl_2 (0,4,6,8%) and CPZ (25,50,125mg/l) at 66.66kPa height for 6 min in postharvest and subsequently stored at 5-6℃. Results indicated that all the CaCl_2 spray (1, 2, 3%) treatments didn't affect significantly the pattern of respiration, ethylene production and firmness of persimmon, but on the other hand 1% Ca(OH)_2 treatment increased internal ethylene concentration of persimmon. All the calcium spray treatments increased content of soluble solids in fruits at postharvest. Hypobaric infiltration with CaCl_2 depressed the internal ethylene concentration,respiration rate, softening rate, polyglalacturonase activity, and membrane breakdown of persimmon during storage. 4% CaCl_2 was the best treatment for persimmon to delay senescence in the conditions used in this test. Hypobaric infiltration CPZ promoted respiratory rising, ethylene production and soing. The paper also discussed the type of respiration ofpersimmon fruit and relationship beween Ca^(2+)-CaM and senescence.