Lunge and the Step Up Feat Chain

[GM Kyle]

Lunge:

Lunge (Combat)
You can strike foes that would normally be out of reach.
Prerequisites: Base attack bonus +6.
Benefit: You can increase the reach of your melee attacks by 5 feet until the end of your turn by taking a –2 penalty to your AC until your next turn. You must decide to use this ability before any attacks are made.

Step Up:

Step Up (Combat)
You can close the distance when a foe tries to move away.
Prerequisite: Base attack bonus +1.
Benefit: Whenever an adjacent foe attempts to take a 5-foot step away from you, you may also make a 5-foot step as an immediate action so long as you end up adjacent to the foe that triggered this ability. If you take this step, you cannot take a 5-foot step during your next turn. If you take an action to move during your next turn, subtract 5 feet from your total movement.

Following Step:

Following Step (Combat)
You can repeatedly close the distance when foes try to move away, without impeding your normal movement.
Prerequisites: Dex 13, Step Up.
Benefit: When using the Step Up feat to follow an adjacent foe, you may move up to 10 feet. You may still take a 5-foot step during your next turn, and any movement you make using this feat does not subtract any distance from your movement during your next turn.
Normal: You can only take a 5-foot step to follow an opponent using Step Up.

Step Up and Strike:

Step Up and Strike (Combat)
When a foe tries to move away, you can follow and make an attack.
Prerequisites: Dex 13, Following Step, Step Up, base attack bonus +6.
Benefit: When using the Step Up or Following Step feats to follow an adjacent foe, you may also make a single melee attack against that foe at your highest base attack bonus. This attack counts as one of your attacks of opportunity for the round. Using this feat does not count toward the number of actions you can usually take each round.
Normal: You can usually only take one standard action and one 5-foot step each round.

If you're using Lunge with a normal non-reach weapon to threaten for 10 ft melee range, would your extended range apply to the Step Up chain?

[Maezer]

GM Kyle wrote:

If you're using Lunge with a normal non-reach weapon to threaten for 10 ft melee range, would your extended range apply to the Step Up chain?

No.

First the reach increasing effect of lunge ends at the end of your turn.

Second step up, and following step both require an adjacent target rather than a threatened target. Thus cannot be use against non adjacent target even if you have reach through some other means.