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Effect of methyl jasmonate on in-vitro pollen germination and tube elongation of Pinus nigra
Protoplasma ( IF 2.5 ) Pub Date : 2020-07-31 , DOI: 10.1007/s00709-020-01539-4
Aslıhan Çetinbaş-Genç 1 , Filiz Vardar 1
Affiliation  

The purpose of the main research was to investigate the effects of methyl jasmonate (MeJA) (0.05, 0.25, 0.5, and 2.5 mM) on the pollen germination and tube elongation of Pinus nigra. Total pollen germination rate increased after MeJA treatments while the most enhancement was observed at 0.05-mM MeJA. No germination was observed at 2.5-mM MeJA. Although the unipolar and bipolar germination were observed in all groups, no significant changes were observed in unipolar and bipolar pollen germination rates after MeJA treatments. Tube length increased only at 0.05-mM MeJA. Although branched tubes were observed in all groups, branched tube rate increased only at 0.05-mM MeJA. Although two branched, three branched, and consecutive branched tubes were observed in all groups, the most common branching type was two branched type in all groups. Although anisotropy of actin filaments in the shank and apex of unbranched tubes decreased after MeJA treatments, the most decrease was observed at 0.05-mM MeJA. Also, anisotropy of actin filaments in the shank and in pre-branching region of branched tubes decreased only at 0.25-mM MeJA. Anisotropy of both two apexes of a branched tube changed only at 0.25- and 0.5-mM MeJA. Callose accumulation in the apex of unbranched and branched tubes increased in parallel with the increase in MeJA concentration. However, more callose is accumulated in one apex than the other apex of a branched tube. In conclusion, MeJA affected the actin organization, changed the callose distribution, and altered the pollen tube growth of Pinus nigra.

中文翻译:

茉莉酸甲酯对黑松离体花粉萌发及管伸长的影响

主要研究的目的是研究茉莉酸甲酯 (MeJA)(0.05、0.25、0.5 和 2.5 mM)对黑松花粉萌发和管伸长的影响。MeJA 处理后总花粉萌发率增加,而在 0.05-mM MeJA 下观察到的增强最大。在 2.5-mM MeJA 下未观察到发芽。尽管在所有组中均观察到单极和双极萌发,但在 MeJA 处理后,单极和双极花粉萌发率均未观察到显着变化。管长仅在 0.05-mM MeJA 时增加。尽管在所有组中均观察到分支管,但分支管率仅在 0.05-mM MeJA 时增加。尽管在所有组中都观察到两个分支、三个分支和连续分支的管,但最常见的分支类型是所有组中的两个分支类型。尽管在 MeJA 处理后,柄和未分支管顶端的肌动蛋白丝的各向异性降低,但在 0.05-mM MeJA 时观察到的降低幅度最大。此外,小腿和分支管的预分支区域中肌动蛋白丝的各向异性仅在 0.25-mM MeJA 时降低。分支管的两个顶点的各向异性仅在 0.25 和 0.5 mM MeJA 时发生变化。无分支管和分支管顶端的胼胝质积累随着 MeJA 浓度的增加而增加。然而,在分支管的一个顶点中积累的胼胝多于另一个顶点。总之,MeJA影响了肌动蛋白组织,改变了胼胝分布,并改变了黑松花粉管的生长。在 0.05 mM MeJA 下观察到的下降幅度最大。此外,小腿和分支管的预分支区域中肌动蛋白丝的各向异性仅在 0.25-mM MeJA 时降低。分支管的两个顶点的各向异性仅在 0.25 和 0.5 mM MeJA 时发生变化。无分支管和分支管顶端的胼胝质积累随着 MeJA 浓度的增加而增加。然而,在分支管的一个顶点中积累的胼胝多于另一个顶点。总之,MeJA影响了肌动蛋白组织,改变了胼胝分布,并改变了黑松花粉管的生长。在 0.05 mM MeJA 下观察到的下降幅度最大。此外,小腿和分支管的预分支区域中肌动蛋白丝的各向异性仅在 0.25-mM MeJA 时降低。分支管的两个顶点的各向异性仅在 0.25 和 0.5 mM MeJA 时发生变化。无分支管和分支管顶端的胼胝质积累随着 MeJA 浓度的增加而增加。然而,在分支管的一个顶点中积累的胼胝多于另一个顶点。总之,MeJA影响了肌动蛋白组织,改变了胼胝分布,并改变了黑松花粉管的生长。无分支管和分支管顶端的胼胝质积累随着 MeJA 浓度的增加而增加。然而,在分支管的一个顶点中积累的胼胝多于另一个顶点。总之,MeJA影响了肌动蛋白组织,改变了胼胝分布,并改变了黑松花粉管的生长。无分支管和分支管顶端的胼胝质积累随着 MeJA 浓度的增加而增加。然而,在分支管的一个顶点中积累的胼胝多于另一个顶点。总之,MeJA影响了肌动蛋白组织,改变了胼胝分布,并改变了黑松花粉管的生长。
更新日期:2020-07-31
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