Small temperature variations are a key regulator of reproductive growth and assimilate storage in oil palm (Elaeis guineensis).,Scientific Reports

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Small temperature variations are a key regulator of reproductive growth and assimilate storage in oil palm (Elaeis guineensis).
Scientific Reports ( IF 3.8 ) Pub Date : 2020-01-20 , DOI: 10.1038/s41598-019-57170-8
Naoki Tani _{1,

2} , Zubaidah Aimi Abdul Hamid _{3,

4} , Natra Joseph ₃ , Othman Sulaiman ₃ , Rokiah Hashim ₃ , Takamitsu Arai ₅ , Akiko Satake ₆ , Toshiaki Kondo _{5,

7} , Akihiko Kosugi _{2,

5}

Affiliation

Oil palm is an important crop for global vegetable oil production, and is widely grown in the humid tropical regions of Southeast Asia. Projected future climate change may well threaten palm oil production. However, oil palm plantations currently produce large amounts of unutilised biological waste. Oil palm stems - which comprise two-thirds of the waste - are especially relevant because they can contain high levels of non-structural carbohydrates (NSC) that can serve as feedstock for biorefineries. The NSC in stem are also considered a potent buffer to source-sink imbalances. In the present study, we monitored stem NSC levels and female reproductive growth. We then applied convergent cross mapping (CCM) to assess the causal relationship between the time-series. Mutual causal relationships between female reproductive growth and the stem NSC were detected, with the exception of a relationship between female reproductive organ growth and starch levels. The NSC levels were also influenced by long-term cumulative temperature, with the relationship showing a seven-month time lag. The dynamic between NSC levels and long-term cumulative rainfall showed a shorter time lag. The lower temperatures and higher cumulative rainfall observed from October to December identify this as a period with maximum stem NSC stocks.

中文翻译：

小的温度变化是油棕（Elaeis guineensis）中生殖生长和同化物储存的关键调节剂。

油棕是全球植物油生产的重要农作物，在东南亚潮湿的热带地区广泛种植。预计未来的气候变化可能会严重威胁棕榈油生产。但是，油棕种植园目前会产生大量未利用的生物废物。油棕茎-占废物的三分之二-特别相关，因为它们可能含有高含量的非结构性碳水化合物（NSC），可作为生物炼油厂的原料。茎中的NSC也被认为是缓解源库不平衡的有效缓冲。在本研究中，我们监测了干NSC水平和女性生殖生长。然后，我们应用收敛交叉映射（CCM）来评估时间序列之间的因果关系。除了雌性生殖器官生长与淀粉水平之间的关系外，还检测到雌性生殖生长与茎NSC之间的相互因果关系。NSC水平也受长期累积温度的影响，该关系显示七个月的时间滞后。NSC水平与长期累积降雨之间的动态关系显示出较短的时间滞后。从10月到12月观察到的较低的温度和较高的累积降水量表明这是NSC茎干最大的时期。NSC水平与长期累积降雨之间的动态关系显示出较短的时间滞后。从10月到12月观察到的较低的温度和较高的累积降雨将其确定为干NSC存量最大的时期。NSC水平与长期累积降雨之间的动态关系显示出较短的时间滞后。从10月到12月观察到的较低的温度和较高的累积降雨将其确定为干NSC存量最大的时期。

更新日期：2020-01-21

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