Journal of Food, Agriculture and Environment
Note on the effects of water deficit on photosynthesis, chlorophyll fluorescence and growth of hot pepper
Author(s):
Guang-cheng Shao 1, 2*,
Jing-jing Lan 1, 2, Na Liu 3, Shuang-en Yu 1, 2Recieved Date: 2013-06-11, Accepted Date: 2013-08-20
Abstract:In order to investigate the response of photosynthesis, chlorophyll fluorescence and growth of hot pepper (Capsicum annuum L.) to deficit irrigation. Two drought treatments (in which 50% and 75% irrigation water of the control supplied to both sides of the root system) (DI50, DI75) were imposed on greenhouse grown hot pepper during the growing stages in 2006. Both DI75 and DI50 treatments decreased shoot biomass by 24.97% and 43.83%, total dry mass by 7.29% and 44.10% compared to the control, but increased the root-shoot ratio by 12.50% and 35.40% in relation to the control and with significant differences between DI50 and the control. Deficit irrigation decreased relative leaf water content by about 5.22–22.09% at four stages. DI50 reduced photosynthesis rate (Pn) slightly and transpiration rate (Tr) significantly, and it improved leaf water use efficiency (WUEL, defined as the ratio of Pn to Tr) by 24.24%. During the phase of drought, some impairment of photochemical activity was observed, as revealed by decreases in the maximum quantum yield of PSII (Fv/Fm). However, the difference between DI50 and DI75 and the control was not significant. The mean values of variable fluorescence (Fv), maximal fluorescence (Fm), photochemical quenching (qP) at four stages decreased and minimum fluorescence (F0) and non-photochemical quenching (qN) increased in the soil drought environment. Development of non-radiative energy dissipation mechanisms was evidenced during stress by increases in non-photochemical quenching and decreases in efficiency of excitation capture by open centers. The coordinated changes in fluorescence parameters suggest that the more efficient irrigation strategy are those which can lessen or escape the influence of drought stress on crops during growing period.
Keywords:Hot pepper,
photosynthesis, chlorophyll fluorescence, ornamental character, deficit irrigationJournal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 3&4
Category: Environment
Pages: 2408-2414
Full text for Subscribers
Information:
Note to users
The requested document is freely available only to subscribers/registered users with an online subscription to the Journal of Food, Agriculture & Environment. If you have set up a personal subscription to this title please enter your user name and password. All abstracts are available for free.
Article purchasing
If you like to purchase this specific document such as article, review or this journal issue, contact us. Specify the title of the article or review, issue, number, volume and date of the publication. Software and compilation, Science & Technology, all rights reserved. Your use of this website details or service is governed by terms of use. Authors are invited to check from time to time news or information.
Purchase this Article: 20 Purchase PDF Order Reprints for 15
Share this article :