Journal of Food, Agriculture and Environment

Physiological fundamentals of AnM technique in peanut production: Stomatal oscillations in intact and excised leaves of peanut plants grown with a modified AnM technique

Author(s):

Feifei Qin ^{1, 2, 3}, Tetsuo Takano ¹*, Hui-lian Xu ²*, Fenglan Li ⁴*

Recieved Date: 2011-11-19, Accepted Date: 2012-04-22

Abstract:

Previous research has shown that AnM (including exposing hypocotyl) and the modified AnM (AnM combined with film mulching) techniques improve photosynthesis (P_N), plant growth and the final shell yield in peanut crops. Improvement in P_N was attributed at least in part to increases in stomatal conductance (g_s). Moreover, g_s often oscillates in response to environmental changes. In the present experiment, the effects of the modified AnM technique on the stomatal oscillations were clarified. For the intact leaves of peanut plants, a modified equation from the cosine function showing the cyclic P_N or g_s oscillations under a given PPF was developed as follows: P_N= [P_A+P_Acos(ωt+τ)](1+αt)+P_R(1+βt) or g_s= [g_A+g_Acos(ωt+τ)](1+αt)+g_R(1+βt), where P_A or g_A is the amplitude of P_N or g_s; P_R or g_R is the residual values of P_N or g_s at the first oscillation bottom; t is the time; ω is the angular frequency; τ is the time needed for P_N to move into the oscillation process; α is the constant related to the decay of the oscillation cycles; β is the constant related to the dynamic change of P_R or g_s. Oscillations also occur in the excised leaves during the leaf transpiration was declining and a modified model was used as P_N= [exp(-α_Pt)]{P_A+P_Acos[ω_P(t-τ_P)]}+P_R(1-β_Pt) or g_s= [exp(-α_St)]{g_A+g_Acos[ω_s(t- τ_s)]}+g_R(1-β_st), where P_A or g_A is the amplitude of the first oscillation after P_N or g_s starts decaying, α is the constant related to the decay of the exponential and oscillation cycles. Results of analysis showed that stomata oscillate with higher amplitude and shorter period in peanut plants in AnM plots than in control plots. During the transpiration declining in the excised leaves, oscillations of g_S or P_N were found in the excised leaves but were not clear in CK plots. The water retention ability was higher in the excised leaves from AnM plots than those from CK plots. In conclusion, peanut plants grown with the modified technique could prevent leaf water loss by controlling the stomatal opening and closing regularly.

Keywords:

AnM, mathematical modeling, oscillation, peanut (Arachis hypogaea), photosynthesis, stomata, transpiration, water deficit, xerophytophysiology

---

Journal: Journal of Food, Agriculture and Environment
Year: 2012
Volume: 10
Issue: 2
Category: Agriculture
Pages: 653-658

---

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 :