Enviornmental Plant Bio. Blog » Uncategorized

Lecture Series

mesmith — Thu, 09 Mar 2006 23:53:25 +0000

The lecture entitled “Space…the final frontier…for root phototropism” by John K. Kiss was very interesting and insightful on the development of the study of tropism. I personally knew nothing of this type of movement before the lecture and was suprised to discover that roots and stems were drawn to/repelled by different types of light in growth. The upcoming experiments with red light appear as if they will advance the knowledge on this topic greatly since it seems to be a newer realization of both root and stem (+) responses to red light. Phototropins, seemingly, unique only to plants are extremely interesting to myself seems it has no connection to anything that humans undergo during growth stages. The upcoming experiments on the STS-121 will provide a large amount of substantial detail to this phenomenon. In total, I think it’s amazing that this project will be on the next shuttle launch and that the equiptment is now so high tech as to be able to remove, add, and replicate gravity to experiment tropism in all different combinations of light and gravity. Overall, a very interesting and exciting lecture. I look forward to reading the analysis of the shuttle experiments.

Day 21 : meg and amanda

mesmith — Mon, 06 Mar 2006 19:47:00 +0000

-N,-innoculatn:::-N, +innoculant:::+N, – Innoculant:::: +N, +Innoculant
height 3.1 9.2 5.6 9.5

# leaves 5 pairs 11 pairs 7pairs 11 pairs

height 5.5

# leaves 8 pairs

(-,-) bent, weak stem, tiny leaves, not fully open to light, light green color

(-,+) 2 tendrils, 1 tendril

(+,-) dark green color, leaves crinkely but not due to vien pattern

(+,+) start of three tendrils @ ends, leaves withered @ base (lilke all other plants)

Day 16 : meg and amanda

mesmith — Mon, 06 Mar 2006 19:44:21 +0000

-N,-innoculatn:::-N, +innoculant:::+N, – Innoculant:::: +N, +Innoculant
height 3.1 5.7 4.8 6.6

# leaves 3 7 5 10

height, 4.0

# leaves 5

(-,-) virtually no growht, crooked stem, weak in stature, small leafe surface

(-,+) hieght growth but no more leaves, leaves turned up at angles toward the light, straight stem. venation in leafe doesn’t give them texture

(+,-) crooked stem, small in stature, same height growth, leaves held tight to stem

(+,+) three more leaf pairs, rise of a tendril, leaves more open to light

Day 14 (meg and Amanda)

mesmith — Mon, 06 Mar 2006 19:40:11 +0000

14 Days::: -N,-innoculatn:::-N, +innoculant:::+N, – Innoculant:::: +N, +Innoculant
height 3.1cm 5.2 4.4 4.9

# leaves 3 7 5 7

height 3.5

# leaves 5

(-,-) very little, few leaves small in size

(-,+) open leaves to recieve light, thing stalk/stem

(+,-) leave pairs closed, and held in tight to stalk, shrieved

(+,+) leaves are large, open, crinkely