Table 1: Leaf dry weight and iron concentration for asymptomatic and symptomatic tissues of marigolds at harvest at first open flower, 44 days after treatments began.


Variety

Iron-DTPA
(ppm)

Leaf tissue

Dry wt. (g)

Iron concn (ppm)

Asymptomatic

Symptomatic

Asymptomatic

Symptomatic

First Lady

1

0.46 az

---

561 a

---

 

5

0.50 a

---

640 ab

---

 

15

0.14 b

0.30 a**y

754 b

1030 a**

 

20

0.08 b

0.37 a***

1144 c

1647 b***

Voyager

1

0.52 a

--

483 a

---

 

5

0.39 b

0.18 a***

573 ab

1022 a*

 

15

0.13 c

0.30 b***

679 bc

1195 a**

 

20

0.06 c

0.42 c***

808 c

1171 a*



zMeans within a column of a cultivar followed by different letters indicate significant differences between treatments at P =0.05, pairwise t - test.
y*, **, *** Significant differences between asymptomatic and symptomatic leaf tissue within a treatment at P =0.05, 0.01, and 0.001, respectively, pairwiset - test.