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Mulching affects photosynthetic and chlorophyll a fluorescence characteristics during stage III of peach fruit growth on the rain-fed semiarid Loess Plateau of China

文献类型： 外文期刊

作者： Wang, Chenbing 1 ; Wang, Hong 2 ; Zhao, Xiumei 2 ; Chen, Baihong 1 ; Wang, Falin 1 ;

作者机构： 1.Gansu Agr Univ, Hort Coll, Lanzhou 730070, Peoples R China

2.Gansu Acad Agr Sci, Inst Fruit & Floriculture Res, Lanzhou 730070, Peoples R China

关键词： JIP-test;Photosynthesis;Prunus persica L.;Soil water content;Stomatal conductance;Water stress;Yield

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：3.463； 五年影响因子：3.672 ）

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收录情况： SCI

摘要： In this study, we compared the soil water content of plastic film mulched ridge with furrows (PFM) and straw mulched (SM) and unmulched (clean tillage, CT) peach (Prunus persica L.) orchard soil on the rainfed semiarid Loess Plateau of China during the final stage of rapid fruit growth (stage III) in 2011 and 2012. Analyses were focused on measurements of fast chlorophyll a fluorescence (ChlF), photosynthetic performance, fruit yield and quality. Compared with the CT water management method, PFM and SM significantly increased the soil water content (P < 0.05) by 14.5% and 19.5% in stage III, respectively. Both mulching methods increased the fruit yield (similar to 28%) with no change in fruit quality compared to the CT method. This result was supported by the analysis of the daily average photosynthetic rate (P-N) showed that PN was improved from 11.4 (CT) to 13.1 (PFM) and 12.2 mu mol m(-2) s(-1) (SM); these daily average photosynthetic rates were confirmed by the response curve analysis. Furthermore, the ChlF analyses uncovered major functional differences between the mulched and unmulched leaves at midday: lower connectivity among the photosystem II decreased the number of electron carriers and facilitated the dissipation of excess excitation energy to minimize the potential damage caused by CT drought stress. Nevertheless, the structural integrity and stability of PSII were largely maintained, as reflected by the recovering of the photosynthetic activity after mid-day. (C) 2015 Elsevier B.V. All rights reserved.

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