Key Laboratory of Crop Physio-Ecology and Tillage Science in North-Western Loess Plateau, Ministry of Agriculture, College of Agronomy, Northwest A&F University, Yangling, 712100, Shaanxi, China.
College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, Shaanxi, China.
Protoplasma. 2021 Jan;258(1):139-150. doi: 10.1007/s00709-020-01559-0. Epub 2020 Sep 23.
Phytohormones are important for the growth and development of plants. The objective of the experiment was to investigate the effect of foliar application of uniconazole (UCZ) at the four-leaf stage on hormone crosstalk and production of winter wheat. An experiment was carried out during 2015-2016 and 2016-2017 growth season in a semi-arid region, where UCZ at a concentration of 0 (CK, distilled water), 15 (FU), 30 (FU), and 45 (FU) mg L were sprayed on wheat crop at the four-leaf stage at a rate of 138.8 mL m. UCZ alters the endogenous hormone contents in flag leaves and in grains. UCZ inhibited gibberellic acid (GA) in flag leaves and in grains where the lower GA with UCZ improved the zeatin + zeatin riboside (Z + ZR) and abscisic acid (ABA) contents. The lower GA and higher Z + ZR and ABA contents with UCZ-treated plants improved the chlorophyll content and canopy apparent photosynthesis (CAP) as well as the grain-filling characteristics. The Z + ZR and ABA in flag leaves were positively correlated with chlorophyll content and CAP value while negatively with GA. Moreover, the Z + ZR and ABA were positively correlated with maximum grain weight, mean grain-filling rate, and maximum grain-filling rate, while negatively with GA level. Treatment FU significantly improved the chlorophyll content, CAP value, spike weight, grain-filling characteristics, and hormone contents of Z + ZR and ABA while it decreased the GA level. The hormone crosstalk with UCZ significantly increased the yield of wheat crop, where FU treatment performs better.
植物激素对植物的生长和发育很重要。本试验的目的是研究四叶期叶面喷施烯效唑（UCZ）对冬小麦激素串扰和产量的影响。本试验于 2015-2016 年和 2016-2017 年生长季在半干旱地区进行，在四叶期用 0（CK，蒸馏水）、15（FU）、30（FU）和 45（FU）mg·L-1 UCZ 处理，每公顷用水量为 138.8 升。UCZ 改变了旗叶和籽粒中的内源激素含量。UCZ 抑制了旗叶和籽粒中的赤霉素（GA），而较低浓度的 GA 与 UCZ 一起提高了玉米素+玉米素核苷（Z+ZR）和脱落酸（ABA）的含量。UCZ 处理的植株中较低浓度的 GA 和较高的 Z+ZR 和 ABA 含量提高了叶绿素含量、冠层表观光合作用（CAP）和籽粒灌浆特性。旗叶中的 Z+ZR 和 ABA 与叶绿素含量和 CAP 值呈正相关，与 GA 呈负相关。此外，Z+ZR 和 ABA 与最大粒重、平均灌浆速率和最大灌浆速率呈正相关，与 GA 水平呈负相关。FU 处理显著提高了叶绿素含量、CAP 值、穗重、灌浆特性和 Z+ZR 和 ABA 的激素含量，同时降低了 GA 水平。UCZ 的激素串扰显著提高了小麦的产量，其中 FU 处理表现更好。
