Pre-treating paclobutrazol enhanced chilling tolerance of sweetpotato

Abstract

The difference among florets within a panicle in grain filling and four hormone contents was compared by using two rice varieties differing in panicle type, i.e. compact-panicle variety Xiushui 994 and loose-panicle variety Xiushui 11. Meanwhile the effect of changing source (leaf cutting) and sink (floret removal) on grain filling and four hormone (indole-3-acetic acid, gibberellin, zeatin riboside and abscisic acid)level dynamics in developing grains was also examined. The results showed that Xiushui 994 had greater variation in grain filling rate (GFR), grain weight, filled grain percent (FGP) and four hormone contents during grain filling than Xiushui 11. Moreover, the former variety also showed the greater difference in the time of having the highest hormone contents between superior and inferior florets. The change in source and sink size had great effect on grain filling process and dynamics of four hormone contents, and the extent of the effect varied with variety and floret type. For Xiushui 994, floretremoval treatment had little effect on grain weight and FGP of the superior florets, but caused a marked decrease in GFR and four hormone contents, and a delay in the time when the highest GFR and hormone contents occurred. In the source-reducing treatment, GFR, grain weight and FGP for both superior and interior florets were all decreased. For Xiushui 11, both treatments had little effect on grain development in terms of grain filling properties and hormone content change in the two types of florets. The results indicated that the grain filling of compact-panicle variety is more source-limited than that of loosepanicle one, and relative level of hormone in both superior and inferior florets determined development of inferior florets.

Changes in antioxidant properties and their relationship to paclobutrazol‐ induced flooding tolerance in Welsh onion

“…1 In ornamental crops, PBZ is used to reduce the size of plants, improving compactness. With respect to its other functions, PBZ has been used to provide plant protection against environmental stresses such as chilling, 2 water deficit, 3,4 flooding, 5,6 salt 7 and cadmium. 8 Therefore, the triazoles have been characterized as plant multi-protectants.…”

“…PBZ-treated plants have a more efficient free radical scavenging system that enables them to detoxify active oxygen. 2,6,7,12 The Welsh onion is widely used in cooking, where it is solely used for seasoning purposes. It is a particularly important ingredient in Asian cuisine, especially in East and Southeast Asia.…”

Improving Germination Performance and Chilling Tolerance in Cucumber Seedlings with Paclobutrazol

“…Cell membranes are the primary site of chilling injury in plant cells (Berova et al, 2002;Lin et al, 2006). Lyons (1973) proposed that the immediate and direct response to low temperature in chilling-sensitive plants is phase change transition from a liquid state to a semicrystalline gel state in the lipid portion of cellular membranes at chilling temperatures.…”

Nitrogen Supply Regulates Vascular Bundle Structure and Matter Transport Characteristics of Spring Maize Under High Plant Density

“…However, N requirement of maize is changing with various plant density. For instance, it is necessary to properly increase N input for enhancing dry matter accumulation and distribution and decreasing the competition of nutrients among individuals to increase the grain yield under high plant density, compared with normal plant density (Rajcan and Tollenaar, 1999;Wang et al, 2006;Ren et al, 2017). An insufficient N input will result in the issue of nutrient supply for plants, severely reduce the plant photosynthesis, accumulation of matter and grain yield (Tilman et al, 2002;Chen et al, 2011Chen et al, , 2015Wei et al, 2017).…”