Improving floral initiation in potted Picea abies by supplemental light treatment
Improving floral initiation in potted Picea abies by supplemental light treatment
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DOI：
10.14214/sf.7772
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发表时间：
2018-01-01
期刊：
影响因子：
1.8
通讯作者：
Almqvist, Curt
中科院分区：
文献类型：
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作者：
Almqvist, Curt
光是所有绿色植物的重要环境因子。它的强度、光谱组成和光周期可以影响植物中导致成花起始的调节途径。在这份报告中，结果是从三个实验中，补充光与金属卤化物灯（250 μ mol m（-2）s（-1），20小时天（-1），约。6周）作为其他促花处理（高温、赤霉素A（4）和A（7）（GA（4/7））处理、限制供水）的补充，对盆栽欧洲云杉（Picea abies（L.）喀斯特在温室里。在温室中的花刺激导致更多的花启动相比，花刺激户外。补光处理进一步提高了花的起始，并在更大程度上在雌花比雄花。诱导生殖芽的株系比例和基因型比例增加。在实际应用中的补光处理盆栽欧洲云杉育种材料，90.6%的无性系产生雌花或雄花，或两者兼而有之。将相同材料的一个子集保持在户外，因此受到自然光和温度的影响，尽管用GA（4/7）处理并接受有限的供水，但不产生花。总之，补光处理有利于育种计划，并从新的选择高度改进的基础材料的种子生产的营养生产计划，更有效。
Light is an important environmental factor for all green plants. Its intensity, spectral composition and photoperiod can affect the regulatory pathways in plants that lead to floral initiation. In this report, results are presented from three experiments in which supplemental light with metal halide lamps (250 mu mol m(-2)s(-1), 20 hours day(-1), approx. 6 weeks) was tested as a complement to other flowering stimulation treatments (elevated temperature, treatment with gibberellin A(4) and A(7) (GA(4/7)), restricted water supply) applied to potted Picea abies (L.) Karst. in the greenhouse. Flower stimulation in a greenhouse resulted in more floral initiation compared to flower stimulation outdoors. Supplemental light treatment increased floral initiation further, and to a larger extent in female than in male flowers. It also increased the proportion of trees and genotypes that induced reproductive buds. In a practical application of the supplemental light treatment to potted Picea abies breeding material, 90.6% of the clones produced either female or male flowers, or both. A subset of the same material kept outdoors, and thus subjected to natural light and temperatures, produced no flowers despite being treated with GA(4/7) and receiving a restricted water supply. In conclusion, supplemental light treatment facilitates breeding programmes, and seed production of highly improved base material from new selections for vegetative production programmes, to be more efficient.