Susceptibility of Faba Bean (Vicia faba L.) to Heat Stress During Floral Development and Anthesis.
Susceptibility of Faba Bean (Vicia faba L.) to Heat Stress During Floral Development and Anthesis.
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DOI：
10.1111/jac.12172
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发表时间：
2016-12
影响因子：
3.5
通讯作者：
Jones HE
中科院分区：
文献类型：
--
作者：
Bishop J;Potts SG;Jones HE
通过两年多的试验，对蚕豆（Vicia faba L.）热应激。盆栽冬季蚕豆植物（品种。Wizard）在花发育和开花期间暴露于温度处理（18/10; 22/14; 26/18; 30/22; 34/26 °C白天/夜晚）5天。在胁迫之前对所有花的发育阶段进行评分，使植物在排除昆虫授粉者的情况下生长以防止花之间的花粉移动，并且以单个荚规模收获产量，使得能够以高分辨率研究热胁迫的影响。花的各个阶段对胁迫的敏感性不同;花在最初的绿色芽阶段受到的影响最大。胁迫前花朵的产量和花粉萌发与胁迫呈阈值关系，致死温度（t50）为~ 28 °C和~32 °C，而全株产量与胁迫呈线性负相关，产量分配具有高度可塑性，低节位损失的产量在高节位得到部分补偿。蚕豆对可持续的现代种植系统有许多有益的属性，但这些结果表明，产量将受到预计的气候变化的限制，需要开发耐热品种，或通过其他机制（如提前开花时间）提高弹性。
Experiments were conducted over 2 years to quantify the response of faba bean (Vicia faba L.) to heat stress. Potted winter faba bean plants (cv. Wizard) were exposed to temperature treatments (18/10; 22/14; 26/18; 30/22; 34/26 °C day/night) for 5 days during floral development and anthesis. Developmental stages of all flowers were scored prior to stress, plants were grown in exclusion from insect pollinators to prevent pollen movement between flowers, and yield was harvested at an individual pod scale, enabling effects of heat stress to be investigated at a high resolution. Susceptibility to stress differed between floral stages; flowers were most affected during initial green‐bud stages. Yield and pollen germination of flowers present before stress showed threshold relationships to stress, with lethal temperatures (t 50) ˜28 °C and ~32 °C, while whole plant yield showed a linear negative relationship to stress with high plasticity in yield allocation, such that yield lost at lower nodes was partially compensated at higher nodal positions. Faba bean has many beneficial attributes for sustainable modern cropping systems but these results suggest that yield will be limited by projected climate change, necessitating the development of heat tolerant cultivars, or improved resilience by other mechanisms such as earlier flowering times.
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