Effects of UV-B Radiation on the Performance, Antioxidant Response and Protective Compounds of Hazelnut Pollen.

Increasing ultraviolet (UV) radiation is expected to become a problem in hazelnut cultivation. The aim of this study is to examine the effects of UV-B on hazelnut pollen. To this end, the pollens were exposed to UV-B for 1, 2, and 3 h at distances of 10, 20, 30, and 40 cm.

Let's shape again: the concerted molecular action that builds the pollen tube.

The pollen tube is being subjected to control by a complex network of communication that regulates its shape and the misfunction of a single component causes specific deformations. In flowering plants, the pollen tube is a tubular extension of the pollen grain required for successful sexual reproduction. Indeed, maintaining the unique shape of the pollen tube is essential for the pollen tube to approach the embryo sac.

Treatment with spermidine alleviates the effects of concomitantly applied cold stress by modulating Ca, pH and ROS homeostasis, actin filament organization and cell wall deposition in pollen tubes of Camellia sinensis.

The aim of the current study was to examine the effect of spermidine treatment concomitant with cold stress on the elongation of Camellia sinensis pollen tube. When exogenous spermidine (0.05 mM) was applied concomitantly with cold stress, pollen germination rate and pollen tube length were significantly increased in comparison with cold stressed pollen tubes.

Effect of methyl jasmonate on in-vitro pollen germination and tube elongation of Pinus nigra.

The purpose of the main research was to investigate the effects of methyl jasmonate (MeJA) (0.05, 0.25, 0.

Putrescine modifies the pollen tube growth of tea (Camellia sinensis) by affecting actin organization and cell wall structure.

The aim of the current study was to examine the effect of different exogenous putrescine concentrations (200, 400, 600, and 800 μM) on the tea pollen performance. It was shown that putrescine has a dose-dependent effect on pollen performance. Results exhibited that pollen germination and tube elongation were induced by 200 and 400 μM putrescine treatment, especially, 400 μM putrescine-enhanced pollen performance.