. 2018 Jun 13;13(6):e0197919. doi: 10.1371/journal.pone.0197919

Table 5. Pearson’s product-moment correlation coefficients between metabolite concentration and kernel yield per pot, kernel yield per tiller, and average kernel weight across all temperature and genotype data.

The top six metabolites showing the greatest increase in metabolite concentration in heat stressed plants compared to control plants were selected for correlation.

Compounds	Grain yield per spike	Individual kernel weight
	(g spike¹)	(g kernel^-1)
L-tryptophan	-0.55^***	-0.46^**
Pipecolate	-0.41^*	-0.18
Alpha-aminoadipate	-0.67^***	-0.38^*
L-arginine	-0.72^***	-0.55^***
L-histidine	-0.72^***	-0.60^***
Piperidine	-0.66^***	-0.46^**

*Significant at P<0.05

**significant at P<0.01

***significant at P<0.001.