Plant physiology data for the spring wheat cultivar Mulika, in response to combined ozone and drought exposure in 2015

The data comprise of four datasets for Spring wheat (Triticum aestivum L., cv. Mulika) from a season-long ozone exposure experiment in mesocosms:
i) Yield and biomass data (including harvest index and individual grain weight) gathered at the end of the experiment;
ii) measurements of chlorophyll content index (CCI) measured ad-hoc using a Soil-Plant Analyses Development (SPAD) chlorophyll meter throughout the experiment across all treatments;
iii) measurements of leaf stomatal conductance, measured ad-hoc using a porometer throughout the experiment across all treatments;
iv) results from four growth stage assessments conducted at different stages of the experiment.

Yield and Biomass data are dry weights of non-edge plants, with a cutting height of 5cm above soil level. Leaf chlorophyll and stomatal conductance data were measured on the most recently fully expanded leaf (flag leaf from 28th May 2015 onwards) of randomly selected non-edge plants. The data are from an ozone and drought exposure experiment conducted during April-August 2015 at the Centre for Ecology & Hydrology Bangor solardome facility near Abergwyngregyn (Latitude 53.2387, Longitude -4.0176). The objective of the experiment was to determine how two abiotic stressors in combination - ozone and drought - would interact to influence growth and yield of wheat, and also what impact the timing of drought would have on the result.

Spring wheat (Triticum aestivum L., cv. Mulika) was grown in rows within large 25-litre pots, and exposed to eight ozone treatments for 82 days. Plants experienced either (i) a well-watered regime (ii) a 10-day early-season drought event or (iii) a 10-day late-season drought event. The eight Ozone (O3) treatments ranged from a 24-hour mean of 27 parts per billion (ppb) in the lowest treatment to 57 ppb in the highest, with daily peaks ranging from 32 to 115 ppb

This work was carried out as part of a Ph.D. funded by the Natural Environment Research Council (NERC) (NERC Reference NEC05014/3328/988)

本数据集包含4组源自中型实验生态系统（mesocosms）中全生育期臭氧暴露实验的春小麦（Triticum aestivum L.，品种Mulika）相关数据：
i) 实验结束时采集的产量与生物量数据（含收获指数与单粒谷粒重量）；
ii) 实验全程针对所有处理组，采用土壤-植物分析开发（Soil-Plant Analyses Development, SPAD）叶绿素仪现场测定的叶绿素含量指数（chlorophyll content index, CCI）；
iii) 实验全程针对所有处理组，采用气孔计现场测定的叶片气孔导度；
iv) 实验不同生育阶段开展的4次生长状态评估结果。

产量与生物量数据为非边缘植株的干重，收割高度为土壤上方5 cm处。叶绿素与气孔导度数据采集自随机选取的非边缘植株最新完全展开叶（2015年5月28日起为旗叶）。本实验于2015年4月至8月在阿伯威恩格林（Abergwyngregyn）附近的生态与水文中心班戈太阳穹顶试验设施（Centre for Ecology & Hydrology Bangor solardome facility）开展，地理坐标为北纬53.2387、西经4.0176。

本实验旨在明确臭氧与干旱两种非生物胁迫的交互作用如何影响小麦生长与产量，同时探究干旱施加时机对实验结果的影响。

实验所用春小麦（Triticum aestivum L.，品种Mulika）种植于大型25升盆钵的条播行中，接受82天的8种臭氧处理。植株供水模式分为三类：(i) 充分灌溉；(ii) 生育早期10天干旱胁迫；(iii) 生育晚期10天干旱胁迫。8种臭氧（O₃）处理的24小时平均浓度范围为最低组27十亿分率（parts per billion, ppb）至最高组57 ppb，每日峰值范围为32至115 ppb。

本研究为自然环境研究委员会（Natural Environment Research Council, NERC）资助的博士研究项目（NERC编号：NEC05014/3328/988）的一部分。