Effects of Simulated Dark Shipping on Photosynthetic Status and Post-shipping Performance in Phalaenopsis Sogo Yukidian 'V3'
Effects of Simulated Dark Shipping on Photosynthetic Status and Post-shipping Performance in Phalaenopsis Sogo Yukidian 'V3'
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DOI：
10.21273/jashs.135.2.183
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发表时间：
2010-03-01
影响因子：
1.9
通讯作者：
Chang, Yao-Chien Alex
中科院分区：
文献类型：
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作者：
Hou, Jiunn-Yan;Setter, Tim L.;Chang, Yao-Chien Alex
蝴蝶兰通常是在完全黑暗的情况下长途运输的。为了确定长时间的黑暗期如何影响蝴蝶兰（Sogo Yukidian 'V3）的光合状态，研究了长期模拟黑暗运输后净CO2吸收量、光系统II （PS II）效率和脱落酸（ABA）浓度的变化。盆栽蝴蝶兰（Sogo Yukidian’V3）在20℃下模拟黑暗运输21天后，净CO2吸收率、苹果酸浓度和可滴定酸度下降，但随着运输时间的推移逐渐恢复。运输后需要6到9天才能恢复正常的光合作用状态。Fv/Fm值受运输影响较小。因此，净二氧化碳吸收率将是估计运输后恢复时间的较好指标。运输后，裸根植株鲜重损失、叶片ABA浓度和黄叶数均高于盆栽植株，且随模拟暗期时间延长（7、14和21天）而增加。当植物在裸根条件下储存时，穗（开花茎的出现）日期被推迟。叶片ABA含量在模拟运输后的前3个粘土中呈上升趋势，在随后的3 ~ 8个粘土中呈下降趋势。光合光子通量（PPF）为399 mu mol.m（-2）的植物。相比PPF水平较低的那些，运输后的PS 11效率和净二氧化碳吸收率较低。我们建议装运后驯化6 - 9天，逐渐增加光照（34-72-140-200 mu mol.m(-2)）。s(-1) PPF)或维持140 lima m PPF的光照水平对蝴蝶兰在长时间的暗贮藏后达到较好的光合状态。
Phalaenopsis plants are routinely shipped long distances in total darkness. To determine how these long dark periods affect photosynthetic status in Phalaenopsis Sogo Yukidian 'V3', changes of net CO2 uptake, photosystem II (PS II) efficiency, and abscisic acid (ABA) concentration after a long-term simulated dark shipping were investigated. Net CO2 uptake rate, malate concentration, and titratable acidity in potted Phalaenopsis Sogo Yukidian 'V3' decreased after a 21-day simulated dark shipping at 20 degrees C, but recovered gradually with time after shipping. It took 6 to 9 clays to recover to a normal photosynthetic status after shipping. The value of Fv/Fm was little affected by shipping. Therefore, net CO2 uptake rate would be a better indicator for estimating the recovery time after shipping. After shipping, fresh weight loss, leaf ABA concentration, and number of yellowed leaves of bare-root plants were higher than those of potted plants, and increased with longer durations (7, 14, and 21 clays) of the simulated dark period. The spiking (the emergence of flowering stems) date was delayed when plants were stored in a bare-root condition. The concentration of ABA in leaves rose in the first 3 clays after simulated shipping and then decreased within the next 3 to 8 clays. Plants that received photosynthetic photon flux (PPF) at 399 mu mol.m(-2).s(-1) after shipping had lower PS 11 efficiency and reduced net CO2 uptake rate than those given less PPF levels. We recommend a post-shipping acclimation for 6 to 9 days with gradual light increase (34-72-140-200 mu mol.m(-2).s(-1) PPF) or maintaining a light level of 140 lima m PPF for Phalaenopsis to achieve a better photosynthetic status after prolonged dark storage.