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首页> 美国卫生研究院文献>Annals of Botany >Soybean (Glycine max) Pollen Germination Characteristics Flower and Pollen Morphology in Response to Enhanced Ultraviolet-B Radiation
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Soybean (Glycine max) Pollen Germination Characteristics Flower and Pollen Morphology in Response to Enhanced Ultraviolet-B Radiation

机译：紫外线-B辐射增强对大豆花粉萌发特性花和花粉形态的影响

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• Background and Aims Ultraviolet-B (UV-B) radiation effect on reproductive parts of the plants has received little attention. We studied the influence of UV-B radiation on flower and pollen morphology, pollen production and in vitro pollen germination and tube growth of six genotypes of soybean (Glycine max).• Methods Soybean genotypes were investigated by growing them under four levels of biologically effective UV-B radiation of 0 (control), 5, 10 and 15 kJ m−2 d−1 in sunlit controlled-environment chambers.• Key Results Reductions in lengths of flower, standard petal, and staminal column along with reduced pollen production, germination and tube growth were observed in all genotypes with increasing UV-B radiation. Combined response index (CRI), the sum of percentage relative responses in flower size, pollen production, pollen germination and tube growth due to UV-B radiation varied with UV-B dosage: −67 to −152 with 5 kJ m−2 d−1, −90 to −212 with 10 kJ m−2 d−1, and −118 to −248 with 15 kJ m−2 d−1 of UV-B compared to controls. Genotypes were classified based on the UV-B sensitivity index (USI) calculated as CRI per unit UV-B, where D 90-9216, DG 5630RR and D 88-5320 were classified as tolerant (USI > −7·43), and DP 4933RR, Stalwart III and PI 471938 were sensitive (USI < −7·43) in their response to UV-B radiation. Pollen grains produced in plants grown at 15 kJ m−2 d−1 UV-B radiation were shrivelled and lacked apertures compared to control and other UV-B treatments in both sensitive and tolerant genotypes, and the differences were more conspicuous in the sensitive genotype (PI 471938) than in the tolerant genotype (D 90-9216). The number of columellae heads of the exine was reduced with increasing UV-B radiation.• Conclusions Soybean genotypes varied in their reproductive response to UV-B radiation. The identified UV-B tolerant genotypes could be used in future breeding programmes.
机译：•背景和目的紫外线-B（UV-B）辐射对植物生殖部分的影响很少受到关注。我们研究了UV-B辐射对6种基因型大豆（Glycine max）的花和花粉形态，花粉生成以及体外花粉萌发和试管生长的影响。•方法通过在四种生物学有效水平上使其生长来研究大豆基因型在阳光照射的控制室中，UV-B辐射为0（对照），5、10和15 kJ m −2 d -1 。•主要结果减少了长度随着UV-B辐射的增加，在所有基因型中均观察到花，标准花瓣和耐力柱以及花粉产量，发芽和管生长降低。组合响应指数（CRI），由于UV-B辐射引起的花朵大小，花粉产量，花粉萌发和管生长的相对响应百分比的总和随UV-B剂量的变化而变化：-67至-152（5 kJ m −2 d -1 ，− 90至-212和10 kJ m −2 d -1 ，− 118至与对照组相比，UV-B的-248浓度为15 kJ m -2 d -1 。根据UV-B敏感性指数（USI）对基因型进行分类，其中UV-B敏感性指数按每单位UV-B的CRI计算，其中D 90-9216，DG 5630RR和D 88-5320被归为耐受型（USI> -7·43），并且DP 4933RR，Stalwart III和PI 471938对UV-B辐射敏感（USI <-7·43）。与对照和其他UV-B处理相比，在15 kJ m -2 d -1 UV-B辐射下生长的植物中产生的花粉粒萎缩并且没有孔和耐受基因型之间的差异，敏感基因型（PI 471938）的差异要比耐受基因型（D 90-9216）的差异更为明显。随着UV-B辐射的增加，外壁小柱状头的数量减少。•结论大豆基因型对UV-B辐射的生殖反应各不相同。鉴定出的耐UV-B基因型可用于将来的育种计划。

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