Author:
CHUNGLOO Daonapa,TISARUM Rujira,SAMPHUMPHUANG Thapanee,SOTESARITKUL Thanyaporn,CHA-UM Suriyan
Abstract
Paclobutrazol (PBZ) is a member of plant growth retardants, commonly applied for growth regulation, yield improvement, and biotic and abiotic stress alleviation. However, the effects of PBZ on turmeric (Curcuma longa L.; Zingiberaceae), a rhizomatous herb, have not been well established. The objective of this investigation was to gain a better understanding of the effect of PBZ on two different varieties of turmeric plants, ‘Surat Thani’ (‘URT’; high curcuminoids >5% w/w) and ‘Pichit’ (‘PJT’; low curcuminoids <3% w/w). Pseudostem height of cv. ‘PJT’ treated by 340 µM PBZ was significantly decreased by 14.82% over control, whereas it was unchanged in cv. ‘URT’. Interestingly, leaf greenness (SPAD value), maximum quantum yield of PSII (Fv/Fm) and photon yield of PSII (ΦPSII) in cv. ‘PJT’ treated by 340 µM PBZ were significantly elevated by 1.47, 1.28 and 1.23 folds, over control respectively. Net photosynthetic rate (Pn) in cv. ‘PJT’ declined by 38.58% (340 µM PBZ) over control, as a result of low levels of total soluble sugars (TSS; 127.8 mg g-1 DW) in turmeric rhizome. A positive relation between photosynthetic abilities and aerial fresh weight was demonstrated. In addition, a negative relationship between TSS and total curcuminoids was evidently found (R2 = 0.4524). Curcuminoids yield in turmeric rhizomes significantly dropped, depending on the degree of exogenous foliar PBZ applications. In summary, cv. PJT was found to be very sensitive to PBZ application, whereas rhizome yield and growth traits and high amount of curcuminoids were retained in cv. ‘URT’. Plant growth retention in turmeric cv. ‘URT’ using 170 mM PBZ foliar spray without negative effects on rhizome biomass and total curcuminoids content was demonstrated.
Publisher
University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca
Subject
Horticulture,Plant Science,Agronomy and Crop Science
Reference73 articles.
1. Akamine H, Hossain MA, Ishimine Y, Yogi K, Hokama K, Iraha Y, Aniya Y (2007). Effects of application of N, P and K alone or in combination on growth, yield and curcumin content of turmeric (Curcuma longa L.). Plant Production Science 10:151‒154. https://doi.org/10.1626/pps.10.151
2. Akram M, Shahab-Uddin AA, Usmanghani KHAN, Hannan ABDUL, Mohiuddin E, Asif M (2010). Curcuma longa and curcumin: A review article. Romanian Journal of Biology - Plant Biology 55:65-70.
3. Anandaraj M, Sudharshan MR (2011). Cardamom, ginger and turmeric. Encyclopedia of Life Support Systems (EOLSS)-Soils, Plant Growth and Crop Production. EOLSS Publishers, Oxford, UK.
4. Arzani K, Bahadori F, Piri S (2009). Paclobutrazol reduces vegetative growth and enhances flowering and fruiting of mature ‘JH Hale’ and ‘Red Skin’ peach trees. Horticulture, Environment, and Biotechnology 50:84-93.
5. Assuero SG, Lorenzo M, Pérez Ramírez NM, Velázquez LM, Tognetti JA (2012). Tillering promotion by paclobutrazol in wheat and its relationship with plant carbohydrate status. New Zealand Journal of Agricultural Research 55:347-358. https://doi.org/10.1080/00288233.2012.706223
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献