不同调控措施对烤烟质体色素及其降解产物的影响

Effect of Different Agronomic Measures on Chromoplast Pigment and Its Degraded Products in Flue-cured Tobacco Leaf

研究了不打顶(T1)、打顶(T2)、打顶+追施K2SO4(T3)、打顶+涂抹生长素1次(T4)、打顶+追施K2SO4+涂抹生长素1次(T5)、打顶+追施K2SO4+涂抹生长素2次(T6)6种调控措施对大田期烤烟叶片质体色素含量及其调制后降解产物含量的影响.结果表明,随着生育期延长,烤烟叶绿素含量和类胡萝卜素含量逐渐降低,打顶30d后2种色素含量均以T6最高,T1最低.调制后各处理叶绿素降解产物新植二烯含量(μg.g-1)的高低顺序为:T6(1 129.35)>T5(1 094.06)>T4(1 017.73)>T3(1 011.85)>T2(961.81)>T1(771.15);类胡萝卜素降解产物总量高低顺序(μg.g-1)为:T6(124.94)>T5(118.02)>T4(114.05)>T3(98.30)>T1(98.15)>T2(94.04).T6在打顶30 d后叶绿素和类胡萝卜素含量较高,且调制后能够充分降解,其挥发性致香物质总量也最高.

The effect of different agronomic measures No topping（T1）, Topping（T2）, Topping ＋ K2SO4 （T3）, Topping ＋ Applying IAA 1 time（T4）, Topping ＋ K2SO4 ＋ Applying IAA 1 time（T5）, Topping ＋ K2SO4 ＋ Applying IAA 2 times（T6）） on chromoplast pigment and its degraded products content in fluecured tobacco leaf was studied. Results indicated that the content of chlorophyll and carotene decreased with days increasing after topping. Content of these two kinds of pigments was highest for T6 and lowest for T1 at the period of 30 days after topping. The order of content of neoplytadiene（μg·g^- 1 ） degraded by chlorophyll was：T6（1 129.35） 〉 T5（1 094.06） 〉 T4（1 017.73） 〉 T3（1 011.85） 〉 T2（961.81） 〉 T1（771.15）. The order of content of products degraded by carotene （μg·g^ - 1 ） was ： T6 （124.94） 〉 T5 （118.02） 〉 T4 （ 114.05 ） 〉 T3 （98.30） 〉 T1 （98.15） 〉 T2（94.04）. At 30 days after topping, T6 had the highest content of chlorophyll and carotene, which can be fully degraded, and its total content of volatile aroma matter after leaf curing was highest, too.