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

文献类型： 外文期刊

第一作者： Qin, Feifei

作者： Qin, Feifei;Takano, Tetsuo;Qin, Feifei;Xu, Hui-lian;Qin, Feifei;Li, Fenglan

作者机构：

关键词： AnM;mathematical modeling;oscillation;peanut (Arachis hypogaea);photosynthesis;stomata;transpiration;water deficit;xerophytophysiology

期刊名称：JOURNAL OF FOOD AGRICULTURE & ENVIRONMENT （ 影响因子：0.435； 五年影响因子：0.484 ）

ISSN： 1459-0255

年卷期： 2012 年 10 卷 2 期

页码：

收录情况： SCI

摘要： Previous research has shown that AnM (including exposing hypocotyl) and the modified AnM (AnM combined with film mulching) techniques improve photo:synthesis (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(A)cos(omega t+tau)](1+alpha t)+P-R(1+beta t) or g(s)=[g(A)+g(A)cos( omega t+tau)](1+alpha t)+g(R)(1+beta t), where P-A or g(A) is the amplitude of P-N or g(s); P-R or g(R) is the residual value of P-N or g(s) at the first oscillation bottom; t is the time; omega is the angular frequency; tau is the time needed for P-N to move into the oscillation process; alpha is the constant related to the decay of the oscillation cycles; beta 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(-alpha(p)t)]{P-A+P(A)cos[omega(p)(t-tau(p))]}+P-R(1-beta(p)t) or g(s)=[exp(-alpha(s)t)]{g(A)+g(A)cos[omega(s)(t-tau(s))]}+g(R)(1-beta(s)t), where P-A or g(A) is the amplitude of the first oscillation alter P-N or g(s) starts decaying; alpha 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 modi lied technique could prevent leaf water loss by controlling the stomatal opening and closing regularly.

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