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An Interview with James Marlier @Impello® Biosciences

Admin • 2 October, 2026

Today's podcast explores Impello's approach to plant health, discussing plant stress, reactive oxygen species, antioxidants, biostimulants, environmental conditions, beneficial biology, contamination control, silicon, nutrient management, and strategies for supporting plants through changing growing conditions.

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Introduction

Welcome to today's episode, where we explore Impello's approach to plant health and the science behind managing plant stress. Join us as we discuss what plant stress actually means, how reactive oxygen species and antioxidants fit into the plant response, and what biostimulants can do to support plants through changing growing conditions.

From VPD and environmental stress to beneficial biology, contamination control, silicon, nutrient management, and amino chelates, this conversation takes a closer look at the factors that influence plant health throughout the growing cycle. We also explore sanitising versus sterilising, reinoculation, tank mixing, and product shelf life, offering an insightful discussion on the biological strategies and inputs used to manage plant stress and support more resilient growing environments.

James Marlier

Technical Account Manager • Controlled Agriculture

0:00

Introduction

Elliott introduces the episode and sets the stage for a discussion about plant stress, biostimulants, beneficial biology, environmental conditions, and the approaches used to help plants manage stress.

1:57

What Impello Actually Is

The conversation introduces Impello and explains what the company does, providing context for its approach to plant health, biological inputs, and managing stress in controlled growing environments.

3:27

What Plant Stress Actually Means

The discussion breaks down what plant stress means and why stress is not necessarily a single problem, highlighting the different conditions that can place pressure on plants during production.

5:21

Reactive Oxygen Species

The conversation explores reactive oxygen species and their relationship with plant stress, explaining how these compounds can form as plants respond to challenging conditions.

6:04

What Antioxidants Actually Are

Elliott and the guest explain antioxidants and their role in managing oxidative processes, connecting the concept to how plants respond to stress and maintain biological balance.

8:12

The Fever Analogy

A fever analogy is used to make plant stress easier to understand, illustrating how a stress response can be part of a larger biological process rather than simply something that should always be eliminated.

9:29

We Ask Plants to Be Super Athletes

The discussion compares modern crop production to asking plants to perform like high-level athletes, emphasizing the demanding conditions and productivity expectations placed on plants.

12:18

The Damage Is Not the Pathogen

The conversation examines the difference between a pathogen and the damage associated with a plant's response, exploring how biological stress and plant defense mechanisms can contribute to the outcome.

15:20

What Biostimulants Actually Do

Elliott and the guest discuss the purpose of biostimulants and how they can be used as part of a broader strategy for supporting plant responses to environmental and biological stress.

20:06

When Conditions Are Too Easy

The conversation explores what can happen when growing conditions are kept extremely comfortable and how plants may respond differently when environmental challenges are introduced.

23:20

Which Stress Are You Actually Fighting?

Different sources of plant stress are discussed, emphasizing the importance of identifying the specific stress affecting a crop before deciding how to address it.

26:00

VPD, Explained for Humans

The episode breaks down vapor pressure deficit in practical terms and explains why VPD is an important environmental factor when managing plant growth and stress.

28:53

Everything That Changes at the Flip

The conversation looks at the environmental and biological changes that occur when the crop moves into a new growth stage, including how plants respond to changing conditions.

31:45

Day 21, the Stress Week

The discussion focuses on the challenges plants can encounter around day 21 and why this period is viewed as an important point for monitoring stress and plant responses.

32:59

Day 28, "I Was Just Kidding"

Elliott and the guest continue the discussion of plant development around day 28, highlighting how rapidly conditions and plant responses can change during this stage.

43:39

Mobile Contamination Units

The conversation shifts to contamination control and mobile sanitation units, discussing approaches for managing contamination risks within growing and production environments.

46:26

The Pocket Fix

A practical approach to addressing localized problems is discussed, focusing on how growers can identify and respond to specific problem areas rather than treating an entire environment unnecessarily.

48:55

The Stadium

The stadium analogy is introduced to explain the relationship between beneficial organisms, plant health, and the broader biological environment surrounding the crop.

53:50

Sanitising Is Not Sterilising

The episode distinguishes between sanitising and sterilising, explaining why reducing unwanted organisms is different from attempting to eliminate all microorganisms from an environment.

1:00:10

Reinoculate Every Two to Four Weeks

The discussion covers the practice of reintroducing beneficial biological inputs at regular intervals and why maintaining a biological population can be part of an ongoing plant health strategy.

1:06:20

Silicon Is Essential Now

Elliott and the guest discuss silicon and its growing role in plant production, including its connection to plant structure, environmental stress, and crop management.

1:11:27

Only One Form Is Available

The conversation examines different considerations around silicon inputs and focuses on the specific form that is available for plant uptake and use.

1:19:57

Tank Order

The episode discusses the order in which inputs should be combined in a tank, highlighting how application sequence can matter when working with multiple agricultural products.

1:28:11

Why Amino Chelates Beat EDTA

Elliott and the guest compare amino-based chelation with EDTA chelation, discussing the reasoning behind using amino chelates and their role in nutrient management.

1:34:05

Shelf Life Is an Oxidation Event

The conversation examines shelf life and oxidation, explaining how storage and oxidation can affect biological and nutritional products over time.

1:43:50

What Is Coming Next

The episode closes by looking ahead at upcoming developments, continued innovation, and the future of plant health, biological inputs, and strategies for managing crop stress.

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