Table III. List of compounds that are increased in abundance in C2-Idf internodes.

For each compound, its unique number (No.), m/z, retention time (RT), peak area (as mean ± sd), and ratio of the peak area in C2-Idf and C2 are given. *, Compound detected as an in-source fragment. MS/MS-based structural characterization is given in Supplemental File S1.

No.	m/z	RT (min)	Name	Peak Area, C2	Peak Area, C2-Idf	Ratio, C2-Idf/C2
35	353.0908	2.84	3-O-Caffeoyl quinic acid	62 ± 104	28,607 ± 22,141	461
36	353.0808	4.07	5-O-Caffeoyl quinic acid	4,775 ± 1,626	72,877 ± 48,103	15
37	335.0800	6.00	Caffeoyl shikimic acid 1	4,478 ± 2,717	112,871 ± 86,101	25
38	335.0792	7.50	Caffeoyl shikimic acid 2	170 ± 319	5,571± 6,418	33
39	355.1037	5.24	Feruloyl hexose	1,133 ± 247	41,868 ± 16,125	37
40	193.0503	4.58	3-O-Feruloyl quinic acid*	3,854 ± 824	43,075 ± 15,987	11
41	367.1060	6.59	4-O-Feruloyl quinic acid	1,871 ± 745	52,468 ± 25,642	28
42	326.0910	4.41	2-Hydroxy-2H-1,4-benzoxazin-3(4H)-one-2-O-hexoside	5 ± 14	8,934 ± 3,412	1,740
43	414.1062	7.23	2,4-Dihydroxy-7-methoxy-2H-1,4-benzoxazin-3(4H)-one-2/4-O-acetylhexoside	24 ± 30	42,132 ± 1,4371	1,746